python 全栈开发,Day115(urlencode,批量操作,快速搜索,保留原搜索条件,自定义分页,拆分代码)
今日内容前戏
静态字段和字段
先来看下面一段代码
class Foo: x = 1 # 类变量、静态字段、静态属性 def __init__(self): y = 6 # 实例变量、字段、对象属性 # 实例方法 def func(self): pass # 静态方法 @staticmethod def func(): pass # 类方法 @classmethod def func(): pass @property def start(self) pass
官方说法:x称之为 类变量 y称之为 实例变量
在java和C#中,分别叫 静态字段和字段
函数名
获取函数的名字,可通过 函数.__name__ 方法获取。
那么在django模板中,不能使用双下方法。会报错!
urlencode
什么是urlencode
URL编码(URL encoding),也称作百分号编码(Percent-encoding), 是特定上下文的统一资源定位符 (URL)的编码机制。
为什么要用urlencode
发现现在几乎所有的网站都对url中的汉字和特殊的字符,进行了urlencode操作,也就是:
http://hi.baidu.com/%BE%B2%D0%C4%C0%CF%C8%CB/creat/blog/
这个样子,中间%形式的。注意:urlencode是一种编码,它不是加密方式
url转义是为了符合url的规范,因为在标准的url规范中中文和很多的字符是不允许出现在url中的。
URLEncode就是将URL中特殊部分进行编码。URLDecoder就是对特殊部分进行解码。
因为当字符串数据以url的形式传递给web服务器时,字符串中是不允许出现空格和特殊字符的
譬如:你要传的字符串数据时name=lisi&wangwu 这里的lisi&wangwu是一个字符串 但是服务器只会将lisi识别出来
所以要用到urlencode对这个字符串进行编码
协调开发时,所使用的编码不同。比如:A发送参数携带中文时,使用gbk。B接收时,使用utf-8解码时,就会出现乱码。
那么A发送url的参数使用了URLEncode编码,B接收时使用URLDecoder解码,就不会出现乱码了!
举例:
有一个字典
info = {'k1':'v1','k2':'v2'}
需要转换为
k1=v1&k2=v2
怎么转换?
第一种方法:使用for循环
info = {'k1':'v1','k2':'v2'} list_1 = [] for k,v in info.items(): # print('{}={}'.format(k,v)) list_1.append('{}={}'.format(k,v)) res = '&'.join(list_1) print(res)
执行输出:k1=v1&k2=v2
第一种方法:urlencode
from urllib.parse import urlencode info = {'k1':'v1','k2':'v2'} print(urlencode(info))
以上可以看出,使用urlencode更方便!
字典有多少个key-value,都可以方便的转换!
QueryDict
在django中,request.GET的值类型,是什么呢?是QueryDict
新建一个项目untitled3,注意:django的版本为1.11
修改urls.py,增加路径index
from django.conf.urls import url from django.contrib import admin from app01 import views urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^index/', views.index), ]
修改views.py,增加index视图函数
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): print(request.GET,type(request.GET)) return HttpResponse('ok')
启动django项目,访问index页面
查看Pycharm控制台输出:
<QueryDict: {}> <class 'django.http.request.QueryDict'>
它是一个QueryDict类型
在url上面添加参数,访问url
http://127.0.0.1:8000/index/?name=xiao&age=20
查看Pycharm控制台输出:
<QueryDict: {'age': ['20'], 'name': ['xiao']}> <class 'django.http.request.QueryDict'>
修改views.py,导入QueryDict,查看源码
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict print(request.GET) v = request.GET.urlencode() print(v) return HttpResponse('ok')
它内部调用了urlencode,具体位置,我找不到了...
刷新页面,查看Pycharm控制台输出:
<QueryDict: {'name': ['xiao'], 'age': ['20']}> name=xiao&age=20
request.GET.urlencode,可以直接调用!
能不能在request.GET中,添加一个值呢?
修改views.py,增加一个值
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict print(request.GET) request.GET['k1'] = 666 # 增加一个值 v = request.GET.urlencode() print(v) return HttpResponse('ok')
刷新页面,效果如下:
提示: 这个QueReDICT实例是不可变的,这个是django安全策略做的
如果一定要修改,需要设置一个参数
request.GET._mutable = True
一定要重启django,否则不生效!刷新页面,效果如下:
查看Pycharm控制台输出:
<QueryDict: {'age': ['20'], 'name': ['xiao']}> k1=666&age=20&name=xiao
发现k1已经添加进去了!
为了避免对后续的程序有影响,需要使用深copy
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict import copy print(request.GET) params = copy.deepcopy(request.GET) # 使用深copy params._mutable = True # 允许修改 params['k1'] = 666 # 增加一个值 v = params.urlencode() print(v) return HttpResponse('ok')
重启django项目,刷新页面,效果同上!
查看Pycharm控制台输出,效果同上!
QueryDict 源码里面,提供了方法__deepcopy__ ,它也是做深copy的
def __deepcopy__(self, memo): result = self.__class__('', mutable=True, encoding=self.encoding) memo[id(self)] = result for key, value in six.iterlists(self): result.setlist(copy.deepcopy(key, memo), copy.deepcopy(value, memo)) return result
查看request.GET.copy()的源码,它实际上,就是调用了__deepcopy__
def copy(self): """Returns a mutable copy of this object.""" return self.__deepcopy__({})
修改views.py,改用request.GET.copy()
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict import copy print(request.GET) params = request.GET.copy() # 使用深copy params._mutable = True # 允许修改 params['k1'] = 666 # 增加一个值 v = params.urlencode() print(v) return HttpResponse('ok')
重启django项目,刷新页面,效果同上!
查看Pycharm控制台输出,效果同上!
修改views.py,增加一个列表
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict import copy print(request.GET) params = request.GET.copy() # 使用深copy params._mutable = True # 允许修改 params['k1'] = 666 # 增加一个值 params['k2'] = [11,12] # 增加一个列表 v = params.urlencode() print(v) return HttpResponse('ok')
刷新页面,查看Pycharm控制台输出:
<QueryDict: {'age': ['20'], 'name': ['xiao']}> name=xiao&k2=%5B11%2C+12%5D&k1=666&age=20
发现k2=%5B11%2C+12%5D,这并不是我们想要的结果!
列表需要使用setlist才行
修改views.py,使用setlist
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict import copy print(request.GET) params = request.GET.copy() # 使用深copy params._mutable = True # 允许修改 params['k1'] = 666 # 增加一个值 params.setlist('k4',[11,12]) # 增加一个列表 v = params.urlencode() print(v) return HttpResponse('ok')
重启django项目,刷新页面。查看Pycharm控制台输出:
<QueryDict: {'name': ['xiao'], 'age': ['20']}> k1=666&k4=11&k4=12&name=xiao&age=20
可以看到k4=11&k4=12,它分别设置了2个值!
那么获取k4使用getlist
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict import copy print(request.GET) params = request.GET.copy() # 使用深copy params._mutable = True # 允许修改 params['k1'] = 666 # 增加一个值 params.setlist('k4',[11,12]) # 增加一个列表 print(params.get('k1')) print(params.getlist('k4')) # 获取列表,使用getlist v = params.urlencode() print(v) return HttpResponse('ok')
刷新页面,查看Pycharm控制台输出:
<QueryDict: {'name': ['xiao'], 'age': ['20']}> 666 [11, 12] k4=11&k4=12&k1=666&name=xiao&age=20
在列表中,增加一个值,使用append
修改views.py
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict import copy print(request.GET) params = request.GET.copy() # 使用深copy params._mutable = True # 允许修改 params['k1'] = 666 # 增加一个值 params.setlist('k4',[11,12]) # 增加一个列表 old = params.getlist('k4') # 获取列表 old.append('v4') # 最加一个值 params.setlist('k4',old) # 重新设置 v = params.urlencode() print(v) return HttpResponse('ok')
刷新页面,查看Pycharm控制台输出:
<QueryDict: {'name': ['xiao'], 'age': ['20']}> name=xiao&k1=666&age=20&k4=11&k4=12&k4=v4
可以发现,k4有3个值
保留原来搜索条件
先来访问一个链接:
http://127.0.0.1:8000/index/?name=xiao&age=20
需要在视图函数中的request.GET中,添加一个值_filter。用来保存原来的搜索条件
_filter = "name=xiao&age=20"
最后变成QueryDict,如何操作?
修改views.py
from django.shortcuts import render,HttpResponse # Create your views here. def index(request): from django.http.request import QueryDict url_params_str = request.GET.urlencode() # mutable=True 表示可修改 query_dic = QueryDict(mutable=True) # 添加一个key为_filter query_dic['_filter'] = url_params_str print(query_dic) # 重新编码 new_params = query_dic.urlencode() print(new_params) return HttpResponse('ok')
刷新页面,查看Pycharm控制台输出:
<QueryDict: {'_filter': ['name=xiao&age=20']}> _filter=name%3Dxiao%26age%3D20
最后一个值,使用urlencode编码了
举例:
假设一个场景,先搜索到了一些学生。注意:此时url是有搜索条件的
点击添加按钮,跳转到添加页面。注意:此时的url带有原搜索条件
添加完成后,跳转到原来的页面。注意:此时的url带有原搜索条件
修改urls.py,增加路径
urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^index/', views.index), url(r'^add_stu/', views.add_stu), ]
修改views.py,增肌视图函数
from django.shortcuts import render,HttpResponse,redirect # Create your views here. def index(request): from django.http.request import QueryDict url_params_str = request.GET.urlencode() # mutable=True 表示可修改 query_dic = QueryDict(mutable=True) # 添加一个key为_filter query_dic['_filter'] = url_params_str print(query_dic) # 重新编码 new_params = query_dic.urlencode() print(new_params) # 跳转地址 target_url = "/add_stu?%s" %new_params print(target_url) # 渲染一个a标签 return HttpResponse('<a href="%s">添加学生</a>'%target_url) def add_stu(request): if request.method == "GET": return render(request,"add_stu.html") # 接收到数据,保存到数据库... # 获取搜索条件 origin_params = request.GET.get('_filter') # 返回地址,保留原搜索添加 back_url = "/index/?%s" %origin_params # 重定向页面 return redirect(back_url)
重启django程序,访问页面
注意:这里直接访问的是带有搜索条件的
http://127.0.0.1:8000/index/?name=xiao&age=20
效果如下:
点击添加学生,页面跳转
注意:这里面的_filter,就是原来的搜索条件
点击提交按钮,页面跳转
此时页面:还是带有原来的搜索条件
Q查询高级用法
一般页面使用的搜索功能,都是使用了模糊搜索
比如:查询name包含 "大"或者email包含 "qq"的记录
q = Q() q.connecter = "OR" # 使用OR作为连接符 # 合并条件进行查询,__contains表示使用like查询 q.children.append(('name__contains', '大')) q.children.append(('email__contains', 'qq'))
它相当于 name like '%大%' OR email like '%qq%'
一、批量操作
务必下载github代码:
https://github.com/987334176/luffy_stark/archive/v1.1.zip
因为下面的内容,都是这份代码来修改的!
修改stark-->templates-->stark-->changelist.html,增加select标签
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> <option value="1">批量删除</option> <option value="2">初始化</option> </select> <input class="btn btn-primary" type="submit" value="执行"> </div> </form> <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </div> {% endblock %}
修改 app01-->stark.py,注释部分代码。增加复选框显示
from stark.server.stark import site, StarkConfig from app01 import models from django import forms from django.shortcuts import render from django.conf.urls import url class UserInfoConfig(StarkConfig): list_display = ['id', 'username'] class DepartModelForm(forms.ModelForm): class Meta: model = models.Depart fields = "__all__" def clean_name(self): # 定义钩子 # print(self.cleaned_data['name']) return self.cleaned_data['name'] class DepartConfig(StarkConfig): list_display = [StarkConfig.display_checkbox,'name', 'tel', 'user'] # model_form_class = DepartModelForm # def get_add_btn(self): # 返回None,表示不显示添加按钮 # pass # def changelist_view(self, request): # 重写changelist_view方法 # # 渲染自定义的列表页面 # return render(request,'stark/custom_list.html') # def get_urls(self): # 自定义路由 # info = self.model_class._meta.app_label, self.model_class._meta.model_name # # urlpatterns = [ # url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), # ] # return urlpatterns site.register(models.UserInfo, UserInfoConfig) site.register(models.Depart, DepartConfig)
访问页面: http://127.0.0.1:8000/stark/app01/userinfo/list/
点击下拉菜单,效果如下:
下拉框里面的元素应该是动态的,它是可配置的,每个选项包含了一个id。
如果使用表单提交,那么表单数据就很大了
修改stark-->server-->stark.py,添加变量action_list。用来定义要批量操作的选项
为了防止列表来回更改,导致列表元素重复。使用extend
添加multi_delete和multi_init方法,将action_list传给模板
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe('<input type="checkbox" name="pk" values="%s"/>' %row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self): # 批量删除 pass def multi_init(self): # 批量初始化 pass def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改app01-->stark.py,定义action_list
from stark.server.stark import site, StarkConfig from app01 import models from django import forms from django.shortcuts import render from django.conf.urls import url class UserInfoConfig(StarkConfig): list_display = ['id', 'username'] class DepartModelForm(forms.ModelForm): class Meta: model = models.Depart fields = "__all__" def clean_name(self): # 定义钩子 # print(self.cleaned_data['name']) return self.cleaned_data['name'] class DepartConfig(StarkConfig): list_display = [StarkConfig.display_checkbox,'name', 'tel', 'user'] # model_form_class = DepartModelForm # 批量操作 action_list = [StarkConfig.multi_delete,StarkConfig.multi_init] # def get_add_btn(self): # 返回None,表示不显示添加按钮 # pass # def changelist_view(self, request): # 重写changelist_view方法 # # 渲染自定义的列表页面 # return render(request,'stark/custom_list.html') # def get_urls(self): # 自定义路由 # info = self.model_class._meta.app_label, self.model_class._meta.model_name # # urlpatterns = [ # url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), # ] # return urlpatterns site.register(models.UserInfo, UserInfoConfig) site.register(models.Depart, DepartConfig)
修改 stark-->templates-->stark-->changelist.html,使用for循环action_list
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for func in action_list %} <option value="1">{{ func.__name__ }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> </form> <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </div> {% endblock %}
重启django,查看页面:http://127.0.0.1:8000/stark/app01/depart/list/
效果如下:
提示 变量和属性不能从下划线开始
怎么办呢?让后端把函数名传过来,使用列表生成式
修改stark-->server-->stark.py,使用列表生成式
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe('<input type="checkbox" name="pk" values="%s"/>' %row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self): # 批量删除 pass def multi_init(self): # 批量初始化 pass def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() action_list = [ func.__name__ for func in action_list ] ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改 stark-->templates-->stark-->changelist.html,修改变量名
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for name in action_list %} <option value="1">{{ name }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> </form> <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </div> {% endblock %}
刷新页面,效果如下:
它是英文的,要中文展示,怎么搞?
python一切皆对象,可以为函数添加一个属性。属性名无所谓!
新建一个a.py文件,内容如下:
def func(): print(123) func.aa = '批量删除' print(func.aa)
执行输出:批量删除
同样的道理,给函数multi_delete和multi_init,添加属性text
在列表生成式中,获取text属性
修改stark-->server-->stark.py,
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe('<input type="checkbox" name="pk" values="%s"/>' %row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self): # 批量删除 pass multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self): # 批量初始化 pass multi_init.text = "批量初始化" # 添加自定义属性text def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取text属性 action_list = [ func.text for func in action_list ] ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
重启django,刷新页面,效果如下:
光有中文,无法知道它对应的是哪个函数?value值都是1
修改stark-->server-->stark.py,更改列表生成式的元素为字典
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe('<input type="checkbox" name="pk" values="%s"/>' %row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self): # 批量删除 pass multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self): # 批量初始化 pass multi_init.text = "批量初始化" # 添加自定义属性text def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改 stark-->templates-->stark-->changelist.html,value值为函数名
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> </form> <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </div> {% endblock %}
刷新页面,效果如下:
可以看到value值已经渲染出来了!
那么问题来了,table表格的数据,没有包含到form表单里面
修改 stark-->templates-->stark-->changelist.html,更改form表单
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </form> </div> {% endblock %}
修改stark-->server-->stark.py,修改changelist_view方法,接收post数据
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self): # 批量删除 pass multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self): # 批量初始化 pass multi_init.text = "批量初始化" # 添加自定义属性text def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == "POST": print(request.POST) # 获取post数据 # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
刷新页面,选择批量删除,勾选几条数据。点击提交
查看Pycharm控制台输出:
<QueryDict: {'csrfmiddlewaretoken': ['FtQPfzOYfkiOxGx80QYcIFxqT9wqSpgwWYO1M9rR9lUzkLwDgO6ud260AfIUkJnK'], 'pk': ['1', '2', '3'], 'action': ['multi_delete']}>
获取得到数据了!
接下来需要根据获取的方法名来执行方法。怎么判断呢?使用if?如果有多个方法呢?
这个时候,应该使用反射
修改stark-->server-->stark.py,使用反射执行对应的方法。修改那2个方法
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self,request): # 批量删除 print('批量删除') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == "POST": action_name = request.POST.get('action') getattr(self,action_name)(request) # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
刷新页面,再次选择批量删除,勾选几条数据,点击提交!
查看Pycharm控制台输出: 批量删除
假如有不法分子,修改html呢?
为了避免攻击,使用字典判断,因为字典查询快
修改stark-->server-->stark.py,增加方法get_action_dict
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self,request): # 批量删除 print('批量删除') return HttpResponse('批量删除') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
刷新页面,点击匹配初始化,还是会跳转到当前页面。因为此方法,没有返回值。
点击批量删除,页面效果如下:
修改stark-->server-->stark.py,修改multi_delete方法
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response # 根据排序列表进行排序 queryset = self.model_class.objects.all().order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
刷新页面,选中一条数据,点击提交
发现少了一条数据
访问其它页面,比如: http://127.0.0.1:8000/stark/app01/userinfo/list/
发现下拉框是空的,那么它就不应该显示!
修改stark-->templates-->stark-->changelist.html,添加if判断
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} {% if action_list %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> {% endif %} <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </form> </div> {% endblock %}
刷新页面,效果如下:
多选框,没有了!
其他页面,想使用批量操作,定义action_list变量,就可以了!
二、快速搜索
搜索什么内容,取哪个字段搜,都是可以定制的!
修改stark-->server-->stark.py,增加search_list变量。定义name和tel可以搜索!
增加方法get_search_list方法
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 search_list = ['name','tel'] # 固定搜索字段 def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### from django.db.models import Q search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) # 根据排序列表进行排序 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入add_btn return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
访问url,要带上q参数
http://127.0.0.1:8000/stark/app01/depart/list/?q=总
效果如下:
去掉参数,有2条数据
这样体验不好,要用户输入才行!
修改stark-->server-->stark.py,给changelist.html传入参数q
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 search_list = ['name','tel'] # 固定搜索字段 def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### from django.db.models import Q search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) # 根据排序列表进行排序 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入参数 return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list,'q':q}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改 stark-->templates-->stark-->changelist.html,增加输入框
即使页面刷新,input输入框还会保留搜索的关键字!
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {#添加按钮#} {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} {#搜索框#} <div style="float: right;"> <form method="GET" class="form-inline"> <div class="form-group"> <input class="form-control" type="text" name="q" value="{{ q }}" placeholder="关键字搜索"> <button class="btn btn-primary" type="submit"> <i class="fa fa-search" aria-hidden="true"></i> </button> </div> </form> </div> <form class="form-inline" method="post"> {% csrf_token %} {#批量操作#} {% if action_list %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> {% endif %} {#使用table展示数据#} <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </form> </div> {% endblock %}
访问url: http://127.0.0.1:8000/stark/app01/depart/list/
效果如下:
输入关键字534,点击搜索按钮。那么url会自动带上参数,这个是GET本来就有的功能。因为GET参数在url里面!
同时结果只有一条
如果要搜索负责人呢?注意:这个字段涉及到跨表了。那么填写search_list参数时,要带上下划线
修改stark-->server-->stark.py,修改search_list变量
# 固定搜索字段,如果是跨表字段,要按照ORM语法来 search_list = ['name','tel','user__username']
刷新页面,重新制定关键字
上面是为了方便调试,把搜索字段给固定死了。它应该是可以定制的!
修改stark-->server-->stark.py,将search_list变量设置为空
# 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = []
修改 app01-->stark.py,指定变量search_list
from stark.server.stark import site, StarkConfig from app01 import models from django import forms from django.shortcuts import render from django.conf.urls import url class UserInfoConfig(StarkConfig): list_display = ['id', 'username'] class DepartModelForm(forms.ModelForm): class Meta: model = models.Depart fields = "__all__" def clean_name(self): # 定义钩子 # print(self.cleaned_data['name']) return self.cleaned_data['name'] class DepartConfig(StarkConfig): list_display = [StarkConfig.display_checkbox,'name', 'tel', 'user'] # model_form_class = DepartModelForm # 批量操作 action_list = [StarkConfig.multi_delete,StarkConfig.multi_init] # 搜索关键字 # 固定搜索字段,如果是跨表字段,要按照ORM语法来 search_list = ['name', 'tel', 'user__username'] # def get_add_btn(self): # 返回None,表示不显示添加按钮 # pass # def changelist_view(self, request): # 重写changelist_view方法 # # 渲染自定义的列表页面 # return render(request,'stark/custom_list.html') # def get_urls(self): # 自定义路由 # info = self.model_class._meta.app_label, self.model_class._meta.model_name # # urlpatterns = [ # url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), # ] # return urlpatterns site.register(models.UserInfo, UserInfoConfig) site.register(models.Depart, DepartConfig)
重启django,刷新页面,效果同上!
如果没有定义search_list变量,那么search_list默认为空,它不应该展示!
修改stark-->server-->stark.py,给changelist.html传入参数search_list
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = [] def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### from django.db.models import Q search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) # 根据排序列表进行排序 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入参数 return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list,'q':q,'search_list':search_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改 stark-->templates-->stark-->changelist.html,增加if 判断
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {#添加按钮#} {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} {#搜索框#} {% if search_list %} <div style="float: right;"> <form method="GET" class="form-inline"> <div class="form-group"> <input class="form-control" type="text" name="q" value="{{ q }}" placeholder="关键字搜索"> <button class="btn btn-primary" type="submit"> <i class="fa fa-search" aria-hidden="true"></i> </button> </div> </form> </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} {#批量操作#} {% if action_list %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> {% endif %} {#使用table展示数据#} <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> </form> </div> {% endblock %}
修改app01-->stark.py,注释掉search_list变量
# 固定搜索字段,如果是跨表字段,要按照ORM语法来 # search_list = ['name', 'tel', 'user__username']
访问url: http://127.0.0.1:8000/stark/app01/depart/list/
搜索框就没有了!
在changelist_view中,处理搜索的代码,可以封装成方法。
修改stark-->server-->stark.py,增加get_search_condition方法
from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms from django.db.models import Q class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = [] def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def get_search_condition(self, request): # 根据关键字,组合ORM查询语句 search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) return search_list, q, con def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### search_list, q, con = self.get_search_condition(request) # 根据排序列表进行排序 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入参数 return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list,'q':q,'search_list':search_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self,func): pass def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), url(r'^add/$', self.add_view, name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.change_view, name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.delete_view, name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改app01-->stark.py,开启search_list变量
# 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = ['name', 'tel', 'user__username']
重启django,刷新页面。测试搜索功能,效果同上!
三、保留原搜索条件
在内容前戏部分,讲到了 保留原搜索条件。关键点在于:搜索到结果后,跳转其他页面时,url要带上原搜索条件。
比如页面默认展示的是20条数据。搜索了2个用户,并编辑保存。跳转的页面应该也还是之前2个客户的数据,而不是20数据(返回列表首页)
页面上的a标签,button按钮。这些url是反向生成的,能不能加条件?加上原来的搜索条件?
答案是可以的!
装饰器
查看 stark-->server-->stark.py,StarkConfig类里面的get_urls方法。里面定义了4个视图函数,它们是有request变量的。除此之外,其他函数也需要使用request变量,怎么办?一个一个传?
太麻烦了,使用装饰器就可以解决!
修改 stark-->server-->stark.py,修改StarkConfig类的__init__方法,添加变量request。
增加装饰器wrapper。并定义self.request = request,对request重新赋值!
修改get_urls方法,应用装饰器
import functools from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms from django.db.models import Q from django.http import QueryDict class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site # 定义request变量,用于非视图函数使用。 # 在wrapper装饰器中,对这个值重新赋值! self.request = None # url中的搜索条件,存在字典中。key为_filter self.back_condition_key = "_filter" def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = [] def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def get_search_condition(self, request): # 根据关键字,组合ORM查询语句 search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) return search_list, q, con def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### search_list, q, con = self.get_search_condition(request) # 根据排序列表进行排序 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入参数 return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list,'q':q,'search_list':search_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self, func): @functools.wraps(func) def inner(request, *args, **kwargs): self.request = request return func(request, *args, **kwargs) return inner def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.wrapper(self.changelist_view), name='%s_%s_changelist' % info), url(r'^add/$', self.wrapper(self.add_view), name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.wrapper(self.change_view), name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.wrapper(self.delete_view), name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) if not self.request.GET: return add_url param_str = self.request.GET.urlencode() # q=嘉瑞&page=2 new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str add_url = "%s?%s" % (add_url, new_query_dict.urlencode(),) return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
重启django,刷新页面,效果同上!
修改 stark-->server-->stark.py,修改reverse_add_url方法,增加搜索条件
其它3个方法reverse_del_url,reverse_edit_url,reverse_list_url也同样需要添加
import functools from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms from django.db.models import Q from django.http import QueryDict class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site # 定义request变量,用于非视图函数使用。 # 在wrapper装饰器中,对这个值重新赋值! self.request = None # url中的搜索条件,存在字典中。key为_filter self.back_condition_key = "_filter" def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = [] def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def get_search_condition(self, request): # 根据关键字,组合ORM查询语句 search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) return search_list, q, con def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### search_list, q, con = self.get_search_condition(request) # 根据排序列表进行排序 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by()) ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入参数 return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list,'q':q,'search_list':search_list}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self, func): @functools.wraps(func) def inner(request, *args, **kwargs): self.request = request return func(request, *args, **kwargs) return inner def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.wrapper(self.changelist_view), name='%s_%s_changelist' % info), url(r'^add/$', self.wrapper(self.add_view), name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.wrapper(self.change_view), name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.wrapper(self.delete_view), name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) # 获取当前请求的_filter参数,也就是跳转之前的搜索条件 origin_condition = self.request.GET.get(self.back_condition_key) if not origin_condition: # 如果没有获取到 return list_url # 返回列表页面 # 列表地址和搜索条件拼接 list_url = "%s?%s" % (list_url, origin_condition,) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) if not self.request.GET: # 判断get参数为空 return add_url # 返回原url # request.GET的数据类型为QueryDict # 对QueryDict做urlencode编码 param_str = self.request.GET.urlencode() # 比如q=xiao&age=20 # 允许对QueryDict做修改 new_query_dict = QueryDict(mutable=True) # 添加键值对. _filter = param_str new_query_dict[self.back_condition_key] = param_str # 添加url和搜索条件做拼接 add_url = "%s?%s" % (add_url, new_query_dict.urlencode(),) # 返回最终url return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) if not self.request.GET: return edit_url param_str = self.request.GET.urlencode() new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str edit_url = "%s?%s" % (edit_url, new_query_dict.urlencode(),) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) if not self.request.GET: return del_url param_str = self.request.GET.urlencode() new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str del_url = "%s?%s" % (del_url, new_query_dict.urlencode(),) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
重启django项目,访问页面: http://127.0.0.1:8000/stark/app01/depart/list/
输入搜索条件 xiao,点击搜索按钮
查看添加按钮的跳转地址,发下已经添加了搜索条件
修改app01-->stark.py,增加编辑和删除选项
from stark.server.stark import site, StarkConfig from app01 import models from django import forms from django.shortcuts import render from django.conf.urls import url class UserInfoConfig(StarkConfig): list_display = ['id', 'username'] class DepartModelForm(forms.ModelForm): class Meta: model = models.Depart fields = "__all__" def clean_name(self): # 定义钩子 # print(self.cleaned_data['name']) return self.cleaned_data['name'] class DepartConfig(StarkConfig): list_display = [StarkConfig.display_checkbox,'name', 'tel', 'user',StarkConfig.display_edit_del] # model_form_class = DepartModelForm # 批量操作 action_list = [StarkConfig.multi_delete,StarkConfig.multi_init] # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = ['name', 'tel', 'user__username'] # def get_add_btn(self): # 返回None,表示不显示添加按钮 # pass # def changelist_view(self, request): # 重写changelist_view方法 # # 渲染自定义的列表页面 # return render(request,'stark/custom_list.html') # def get_urls(self): # 自定义路由 # info = self.model_class._meta.app_label, self.model_class._meta.model_name # # urlpatterns = [ # url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), # ] # return urlpatterns site.register(models.UserInfo, UserInfoConfig) site.register(models.Depart, DepartConfig)
刷新页面,查看编辑和删除的herf属性
发送链接地址,也加上了搜索条件。
点击编辑按钮,此时的url地址为:
http://127.0.0.1:8000/stark/app01/depart/1/change/?_filter=q%3Dxiao
修改一条数据,点击提交
页面跳转地址,此时之前的搜索条件还在!
http://127.0.0.1:8000/stark/app01/depart/list/?q=xiao
效果如下:
如果有分页功能,这个搜索条件,还要不要?当然要啊!
四、自定义分页
展示数据页面数据过多,一般会采用分页处理。
这里使用的分页,不是django自带的分页器(paginator) ,使用的是自定义分页类。为什么?虽然使用paginator也可以完成。但是我们要做的是,跨框架的组件。即使在flask框架中,也依然能使用!
进入stark应用目录,创建文件夹utils,它表示工具类。在此文件夹下创建文件pagination.py
注意:分页跳转时,它是带有搜索条件的
这里没有使用request.GET.urlencode(),为了做到通用性。其他框架也可以使用!
""" 分页组件 """ from urllib.parse import urlencode class Pagination(object): def __init__(self, current_page, all_count, base_url,query_params, per_page=10, pager_page_count=11): """ 分页初始化 :param current_page: 当前页码 :param per_page: 每页显示数据条数 :param all_count: 数据库中总条数 :param base_url: 基础URL :param query_params: QueryDict对象,内部含所有当前URL的原条件 :param pager_page_count: 页面上最多显示的页码数量 """ self.base_url = base_url try: self.current_page = int(current_page) if self.current_page <= 0: # 当前页码数不能小于等于0 raise Exception() except Exception as e: self.current_page = 1 self.query_params = query_params self.per_page = per_page self.all_count = all_count self.pager_page_count = pager_page_count pager_count, b = divmod(all_count, per_page) if b != 0: pager_count += 1 self.pager_count = pager_count half_pager_page_count = int(pager_page_count / 2) self.half_pager_page_count = half_pager_page_count @property def start(self): """ 数据获取值起始索引 :return: """ return (self.current_page - 1) * self.per_page @property def end(self): """ 数据获取值结束索引 :return: """ return self.current_page * self.per_page def page_html(self): """ 生成HTML页码 :return: """ # 如果数据总页码pager_count<11 pager_page_count if self.pager_count < self.pager_page_count: pager_start = 1 pager_end = self.pager_count else: # 数据页码已经超过11 # 判断: 如果当前页 <= 5 half_pager_page_count if self.current_page <= self.half_pager_page_count: pager_start = 1 pager_end = self.pager_page_count else: # 如果: 当前页+5 > 总页码 if (self.current_page + self.half_pager_page_count) > self.pager_count: pager_end = self.pager_count pager_start = self.pager_count - self.pager_page_count + 1 else: pager_start = self.current_page - self.half_pager_page_count pager_end = self.current_page + self.half_pager_page_count page_list = [] if self.current_page <= 1: prev = '<li><a href="#">上一页</a></li>' else: self.query_params['page'] = self.current_page - 1 prev = '<li><a href="%s?%s">上一页</a></li>' % (self.base_url,self.query_params.urlencode()) page_list.append(prev) for i in range(pager_start, pager_end + 1): self.query_params['page'] = i if self.current_page == i: tpl = '<li class="active"><a href="%s?%s">%s</a></li>' % ( self.base_url, self.query_params.urlencode(), i,) else: tpl = '<li><a href="%s?%s">%s</a></li>' % (self.base_url, self.query_params.urlencode(), i,) page_list.append(tpl) if self.current_page >= self.pager_count: nex = '<li><a href="#">下一页</a></li>' else: self.query_params['page'] = self.current_page + 1 nex = '<li><a href="%s?%s">下一页</a></li>' % (self.base_url, self.query_params.urlencode(),) page_list.append(nex) page_str = "".join(page_list) return page_str
打开表app01_depart,添加几条数据
修改app01-->stark.py,增加id显示
from stark.server.stark import site, StarkConfig from app01 import models from django import forms from django.shortcuts import render from django.conf.urls import url class UserInfoConfig(StarkConfig): list_display = ['id', 'username'] class DepartModelForm(forms.ModelForm): class Meta: model = models.Depart fields = "__all__" def clean_name(self): # 定义钩子 # print(self.cleaned_data['name']) return self.cleaned_data['name'] class DepartConfig(StarkConfig): list_display = [StarkConfig.display_checkbox,'id','name', 'tel', 'user',StarkConfig.display_edit_del] # model_form_class = DepartModelForm # 批量操作 action_list = [StarkConfig.multi_delete,StarkConfig.multi_init] # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = ['name', 'tel', 'user__username'] # def get_add_btn(self): # 返回None,表示不显示添加按钮 # pass # def changelist_view(self, request): # 重写changelist_view方法 # # 渲染自定义的列表页面 # return render(request,'stark/custom_list.html') # def get_urls(self): # 自定义路由 # info = self.model_class._meta.app_label, self.model_class._meta.model_name # # urlpatterns = [ # url(r'^list/$', self.changelist_view, name='%s_%s_changelist' % info), # ] # return urlpatterns site.register(models.UserInfo, UserInfoConfig) site.register(models.Depart, DepartConfig)
访问url: http://127.0.0.1:8000/stark/app01/depart/list/
效果如下:
修改 stark-->server-->stark.py,处理分页,并传入参数page给changelist.html
import functools from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms from django.db.models import Q from django.http import QueryDict class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site # 定义request变量,用于非视图函数使用。 # 在wrapper装饰器中,对这个值重新赋值! self.request = None # url中的搜索条件,存在字典中。key为_filter self.back_condition_key = "_filter" def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = [] def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def get_search_condition(self, request): # 根据关键字,组合ORM查询语句 search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) return search_list, q, con def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### search_list, q, con = self.get_search_condition(request) # ##### 处理分页 ##### from stark.utils.pagination import Pagination # 总条数 total_count = self.model_class.objects.filter(con).count() # 复制GET参数 query_params = request.GET.copy() # 允许编辑 query_params._mutable = True # 使用分页类Pagination,传入参数。每页显示3条 page = Pagination(request.GET.get('page'), total_count, request.path_info, query_params, per_page=3) # 根据排序列表进行排序,以及分页功能 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by())[page.start:page.end] ### 批量操作 ### action_list = self.get_action_list() # 获取函数名以及text属性 action_list = [{'name': func.__name__, 'text': func.text} for func in action_list] # print(action_list) ### 添加按钮 ### add_btn = self.get_add_btn() # 添加按钮返回值,不为空展示,否则不展示 list_display = self.list_display # 定义显示的列 header_list = [] # 定义头部,用来显示verbose_name if list_display: for name_or_func in list_display: if isinstance(name_or_func,FunctionType): # 执行函数,默认显示中文 verbose_name = name_or_func(self,header=True) else: # 获取指定字段的verbose_name verbose_name = self.model_class._meta.get_field(name_or_func).verbose_name header_list.append(verbose_name) else: # 如果list_display为空,添加表名 header_list.append(self.model_class._meta.model_name) body_list = [] # 显示内容 for row in queryset: # 这里的row是对象,它表示表里面的一条数据 row_list = [] # 展示每一行数据 if not list_display: # 如果不在list_display里面 # 添加对象 row_list.append(row) body_list.append(row_list) continue for name_or_func in list_display: if isinstance(name_or_func,FunctionType): val = name_or_func(self,row=row) # 执行函数获取,传递row对象 else: # 使用反射获取对象的值 val = getattr(row, name_or_func) row_list.append(val) body_list.append(row_list) # 注意:要传入参数 return render(request,'stark/changelist.html',{'header_list':header_list,'body_list':body_list,'add_btn':add_btn,'action_list':action_list,'q':q,'search_list':search_list,'page':page}) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self, func): @functools.wraps(func) def inner(request, *args, **kwargs): self.request = request return func(request, *args, **kwargs) return inner def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.wrapper(self.changelist_view), name='%s_%s_changelist' % info), url(r'^add/$', self.wrapper(self.add_view), name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.wrapper(self.change_view), name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.wrapper(self.delete_view), name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) # 获取当前请求的_filter参数,也就是跳转之前的搜索条件 origin_condition = self.request.GET.get(self.back_condition_key) if not origin_condition: # 如果没有获取到 return list_url # 返回列表页面 # 列表地址和搜索条件拼接 list_url = "%s?%s" % (list_url, origin_condition,) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) if not self.request.GET: # 判断get参数为空 return add_url # 返回原url # request.GET的数据类型为QueryDict # 对QueryDict做urlencode编码 param_str = self.request.GET.urlencode() # 比如q=xiao&age=20 # 允许对QueryDict做修改 new_query_dict = QueryDict(mutable=True) # 添加键值对. _filter = param_str new_query_dict[self.back_condition_key] = param_str # 添加url和搜索条件做拼接 add_url = "%s?%s" % (add_url, new_query_dict.urlencode(),) # 返回最终url return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) if not self.request.GET: return edit_url param_str = self.request.GET.urlencode() new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str edit_url = "%s?%s" % (edit_url, new_query_dict.urlencode(),) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) if not self.request.GET: return del_url param_str = self.request.GET.urlencode() new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str del_url = "%s?%s" % (del_url, new_query_dict.urlencode(),) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
修改 stark-->templates-->stark-->changelist.html,增加分页标签
{% extends 'stark/layout.html' %} {% block content %} <h1>列表页面</h1> <div> {#添加按钮#} {% if add_btn %} <div style="margin: 5px 0;"> {{ add_btn }} </div> {% endif %} {#搜索框#} {% if search_list %} <div style="float: right;"> <form method="GET" class="form-inline"> <div class="form-group"> <input class="form-control" type="text" name="q" value="{{ q }}" placeholder="关键字搜索"> <button class="btn btn-primary" type="submit"> <i class="fa fa-search" aria-hidden="true"></i> </button> </div> </form> </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} {#批量操作#} {% if action_list %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> {% endif %} {#使用table展示数据#} <table class="table table-bordered"> <thead> <tr> {% for item in header_list %} <th>{{ item }}</th> {% endfor %} </tr> </thead> <tbody> {% for row_list in body_list %} <tr> {% for col in row_list %} <td>{{ col }}</td> {% endfor %} </tr> {% endfor %} </tbody> </table> {#分页展示#} <nav aria-label="Page navigation"> <ul class="pagination"> {{ page.page_html|safe }} </ul> </nav> </form> </div> {% endblock %}
基本测试
重启django,刷新页面,效果如下:
测试搜索条件
五、拆分代码
上面的 stark-->server-->stark.py,代码太冗长。不方便扩展功能!
要用面向对象的封装特性,来做代码拆分。
首先拆分changelist_view方法的render,它传了很多参数!代码太长!
修改stark-->server-->stark.py,添加ChangeList类。将changelist_view中的相关变量移植过来
import functools from django.conf.urls import url from django.shortcuts import HttpResponse,render,redirect from types import FunctionType from django.utils.safestring import mark_safe from django.urls import reverse from django import forms from django.db.models import Q from django.http import QueryDict class ChangeList(object): """ 封装列表页面需要的所有功能 """ def __init__(self,config,queryset,q,search_list,page): ### 处理搜索 ### self.q = q # 搜索条件 self.search_list = search_list # 搜索字段 self.page = page # 分页 # 配置参数 self.config = config # 批量操作 self.action_list = [{'name': func.__name__, 'text': func.text} for func in config.get_action_list()] # 添加按钮 self.add_btn = config.get_add_btn() # ORM执行结果 self.queryset = queryset # 显示的列 self.list_display = config.get_list_display() class StarkConfig(object): def __init__(self,model_class,site): self.model_class = model_class self.site = site # 定义request变量,用于非视图函数使用。 # 在wrapper装饰器中,对这个值重新赋值! self.request = None # url中的搜索条件,存在字典中。key为_filter self.back_condition_key = "_filter" def display_checkbox(self,row=None,header=False): # 显示复选框 if header: # 输出中文 return "选择" # 注意:这里要写row.pk,不能写row.id。你不能保证每一个表的主键都是id return mark_safe("<input type='checkbox' name='pk' value='%s' />" % row.pk) def display_edit(self, row=None, header=False): if header: return "编辑" return mark_safe( '<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a>' % self.reverse_edit_url(row)) def display_del(self, row=None, header=False): if header: return "删除" return mark_safe( '<a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a>' % self.reverse_del_url(row)) def display_edit_del(self, row=None, header=False): if header: return "操作" tpl = """<a href="%s"><i class="fa fa-edit" aria-hidden="true"></i></a></a> | <a href="%s"><i class="fa fa-trash-o" aria-hidden="true"></i></a> """ % (self.reverse_edit_url(row), self.reverse_del_url(row),) return mark_safe(tpl) def multi_delete(self, request): # 批量删除 """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" # 添加自定义属性text def multi_init(self,request): # 批量初始化 print('批量初始化') multi_init.text = "批量初始化" # 添加自定义属性text order_by = [] # 需要排序的字段,由用户自定义 list_display = [] # 定义显示的列,由用户自定义 model_form_class = None # form组件需要的model_class action_list = [] # 批量操作方法 # 搜索字段,如果是跨表字段,要按照ORM语法来 search_list = [] def get_order_by(self): # 获取排序列表 return self.order_by def get_list_display(self): # 获取显示的列 return self.list_display def get_add_btn(self): # 显示添加按钮 return mark_safe('<a href="%s" class="btn btn-success">添加</a>' % self.reverse_add_url()) def get_model_form_class(self): """ 获取ModelForm类 :return: """ if self.model_form_class: return self.model_form_class class AddModelForm(forms.ModelForm): class Meta: model = self.model_class fields = "__all__" return AddModelForm def get_action_list(self): # 获取批量操作方法 val = [] # 空列表 # 扩展列表的元素 val.extend(self.action_list) return val def get_action_dict(self): # 获取匹配操作字典 val = {} for item in self.action_list: # 以方法名为key val[item.__name__] = item return val def get_search_list(self): # 获取搜索字段 val = [] val.extend(self.search_list) return val def get_search_condition(self, request): # 根据关键字,组合ORM查询语句 search_list = self.get_search_list() # ['name','tel'] q = request.GET.get('q', "") # 搜索条件 con = Q() con.connector = "OR" # 以OR作为连接符 if q: # 判断条件不为空 for field in search_list: # 合并条件进行查询, __contains表示使用like查询 con.children.append(('%s__contains' % field, q)) return search_list, q, con def changelist_view(self, request): """ 所有URL查看列表页面 :param request: :return: """ if request.method == 'POST': action_name = request.POST.get('action') action_dict = self.get_action_dict() if action_name not in action_dict: return HttpResponse('非法请求') response = getattr(self, action_name)(request) if response: return response ### 处理搜索 ### search_list, q, con = self.get_search_condition(request) # ##### 处理分页 ##### from stark.utils.pagination import Pagination # 总条数 total_count = self.model_class.objects.filter(con).count() # 复制GET参数 query_params = request.GET.copy() # 允许编辑 query_params._mutable = True # 使用分页类Pagination,传入参数。每页显示3条 page = Pagination(request.GET.get('page'), total_count, request.path_info, query_params, per_page=3) # 根据排序列表进行排序,以及分页功能 queryset = self.model_class.objects.filter(con).order_by(*self.get_order_by())[page.start:page.end] cl = ChangeList(self, queryset, q, search_list, page) context = { 'cl': cl } # 注意:要传入参数 return render(request,'stark/changelist.html',context) def add_view(self, request): """ 所有的添加页面,都在此方法处理 使用ModelForm实现 :param request: :return: """ # 添加数据,使用ModelForm AddModelForm = self.get_model_form_class() if request.method == "GET": form = AddModelForm() return render(request,'stark/change.html',{'form':form}) form = AddModelForm(request.POST) # 接收POST数据 if form.is_valid(): # 验证数据 form.save() # 自动保存数据 # 反向生成url,跳转到列表页面 return redirect(self.reverse_list_url()) # 渲染页面,此时会保存表单数据 return render(request, 'stark/change.html', {'form': form}) def change_view(self, request, pk): """ 所有编辑页面 :param request: :param pk: :return: """ # 查看单条数据 obj = self.model_class.objects.filter(pk=pk).first() if not obj: return HttpResponse('数据不存在') # 获取model_form类 ModelFormClass = self.get_model_form_class() if request.method == 'GET': # instance表示生成默认值 form = ModelFormClass(instance=obj) # 渲染页面,添加和修改可以共用一个一个模板文件 return render(request, 'stark/change.html', {'form': form}) # instance = obj 表示指定给谁做修改 form = ModelFormClass(data=request.POST, instance=obj) if form.is_valid(): form.save() # 修改数据 # 跳转到列表页面 return redirect(self.reverse_list_url()) return render(request, 'stark/change.html', {'form': form}) def delete_view(self, request, pk): """ 所有删除页面 :param request: :param pk: :return: """ if request.method == "GET": # cancel_url表示用户点击取消时,跳转到列表页面 return render(request, 'stark/delete.html', {'cancel_url': self.reverse_list_url()}) # 定位单条数据,并删除! self.model_class.objects.filter(pk=pk).delete() return redirect(self.reverse_list_url()) def wrapper(self, func): @functools.wraps(func) def inner(request, *args, **kwargs): self.request = request return func(request, *args, **kwargs) return inner def get_urls(self): info = self.model_class._meta.app_label, self.model_class._meta.model_name urlpatterns = [ url(r'^list/$', self.wrapper(self.changelist_view), name='%s_%s_changelist' % info), url(r'^add/$', self.wrapper(self.add_view), name='%s_%s_add' % info), url(r'^(?P<pk>\d+)/change/', self.wrapper(self.change_view), name='%s_%s_change' % info), url(r'^(?P<pk>\d+)/del/', self.wrapper(self.delete_view), name='%s_%s_del' % info), ] extra = self.extra_url() if extra: # 判断变量不为空 # 扩展路由 urlpatterns.extend(extra) # print(urlpatterns) return urlpatterns def extra_url(self): # 额外的路由,由调用者重构 pass def reverse_list_url(self): # 反向生成访问列表的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_changelist' % (namespace, app_label, model_name) list_url = reverse(name) # 获取当前请求的_filter参数,也就是跳转之前的搜索条件 origin_condition = self.request.GET.get(self.back_condition_key) if not origin_condition: # 如果没有获取到 return list_url # 返回列表页面 # 列表地址和搜索条件拼接 list_url = "%s?%s" % (list_url, origin_condition,) return list_url def reverse_add_url(self): # 反向生成添加url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace name = '%s:%s_%s_add' % (namespace, app_label, model_name) add_url = reverse(name) if not self.request.GET: # 判断get参数为空 return add_url # 返回原url # request.GET的数据类型为QueryDict # 对QueryDict做urlencode编码 param_str = self.request.GET.urlencode() # 比如q=xiao&age=20 # 允许对QueryDict做修改 new_query_dict = QueryDict(mutable=True) # 添加键值对. _filter = param_str new_query_dict[self.back_condition_key] = param_str # 添加url和搜索条件做拼接 add_url = "%s?%s" % (add_url, new_query_dict.urlencode(),) # 返回最终url return add_url def reverse_edit_url(self, row): # 反向生成编辑行内容的url app_label = self.model_class._meta.app_label # app名 model_name = self.model_class._meta.model_name # 表名 namespace = self.site.namespace # 命名空间 # 拼接字符串,这里为change name = '%s:%s_%s_change' % (namespace, app_label, model_name) # 反向生成url,传入参数pk=row.pk edit_url = reverse(name, kwargs={'pk': row.pk}) if not self.request.GET: return edit_url param_str = self.request.GET.urlencode() new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str edit_url = "%s?%s" % (edit_url, new_query_dict.urlencode(),) return edit_url def reverse_del_url(self, row): # 反向生成删除行内容的url app_label = self.model_class._meta.app_label model_name = self.model_class._meta.model_name namespace = self.site.namespace # 注意:这里为del name = '%s:%s_%s_del' % (namespace, app_label, model_name) del_url = reverse(name, kwargs={'pk': row.pk}) if not self.request.GET: return del_url param_str = self.request.GET.urlencode() new_query_dict = QueryDict(mutable=True) new_query_dict[self.back_condition_key] = param_str del_url = "%s?%s" % (del_url, new_query_dict.urlencode(),) return del_url @property def urls(self): return self.get_urls() class AdminSite(object): def __init__(self): self._registry = {} self.app_name = 'stark' self.namespace = 'stark' def register(self,model_class,stark_config=None): # not None的结果为Ture if not stark_config: # 也就是说,当其他应用调用register时,如果不指定stark_config参数 # 那么必然执行下面这段代码! # stark_config和StarkConfig是等值的!都能实例化 stark_config = StarkConfig # 添加键值对,实例化类StarkConfig,传入参数model_class # self指的是AdminSite类 self._registry[model_class] = stark_config(model_class,self) # print(self._registry) # 打印字典 """ { app01.models.UserInfo:StarkConfig(app01.models.UserInfo) app02.models.Role:RoleConfig(app02.models.Role) } """ # for k, v in self._registry.items(): # print(k,v) def get_urls(self): urlpatterns = [] for k, v in self._registry.items(): # k=modes.UserInfo,v=StarkConfig(models.UserInfo), # 封装:model_class=UserInfo,site=site对象 # k=modes.Role,v=RoleConfig(models.Role) # 封装:model_class=Role,site=site对象 app_label = k._meta.app_label model_name = k._meta.model_name urlpatterns.append(url(r'^%s/%s/' % (app_label, model_name,), (v.urls, None, None))) return urlpatterns @property def urls(self): # 调用get_urls方法 # self.app_name和self.namespace值是一样的,都是stark return self.get_urls(), self.app_name, self.namespace site = AdminSite() # 实例化类
inclusion_tag+yield
列表页面中的table表格数据,应该使用inclusion_tag+yield
进入stark应用目录,创建目录templatetags,目录名必须是这个!在此目录新建文件stark.py
from django.template import Library from types import FunctionType register = Library() def header_list(cl): """ 表头 :param cl: :return: """ if cl.list_display: for name_or_func in cl.list_display: if isinstance(name_or_func, FunctionType): verbose_name = name_or_func(cl.config, header=True) else: verbose_name = cl.config.model_class._meta.get_field(name_or_func).verbose_name yield verbose_name else: yield cl.config.model_class._meta.model_name def body_list(cl): """ 表格内容 :param cl: :return: """ for row in cl.queryset: row_list = [] if not cl.list_display: row_list.append(row) yield row_list continue for name_or_func in cl.list_display: if isinstance(name_or_func, FunctionType): val = name_or_func(cl.config, row=row) else: val = getattr(row, name_or_func) row_list.append(val) yield row_list @register.inclusion_tag('stark/table.html') def table(cl): return {'header_list':header_list(cl),'body_list':body_list(cl)}
修改 stark-->templates-->stark-->custom_list.html,使用inclusion_tag
{% extends 'stark/layout.html' %} {% load stark %} {% block content %} <h1>列表页面</h1> <div> {#添加按钮#} {% if cl.add_btn %} <div style="margin: 5px 0;"> {{ cl.add_btn }} </div> {% endif %} {#搜索框#} {% if cl.search_list %} <div style="float: right;"> <form method="GET" class="form-inline"> <div class="form-group"> <input class="form-control" type="text" name="q" value="{{ cl.q }}" placeholder="关键字搜索"> <button class="btn btn-primary" type="submit"> <i class="fa fa-search" aria-hidden="true"></i> </button> </div> </form> </div> {% endif %} <form class="form-inline" method="post"> {% csrf_token %} {#批量操作#} {% if cl.action_list %} <div class="form-group"> <select name="action" class="form-control" style="min-width: 200px;"> <option>请选择功能</option> {% for item in cl.action_list %} <option value="{{ item.name }}">{{ item.text }}</option> {% endfor %} </select> <input class="btn btn-primary" type="submit" value="执行"> </div> {% endif %} {#使用table展示数据#} {% table cl %} {#分页展示#} <nav aria-label="Page navigation"> <ul class="pagination"> {{ cl.page.page_html|safe }} </ul> </nav> </form> </div> {% endblock %}
务必重启django,因为必须重启,inclusion_tag才会生效!
访问url: http://127.0.0.1:8000/stark/app01/depart/list
效果如下:
总结:
1. 批量操作[扩展] - 反射 - __name__ - 一切皆对象 def multi_delete(self,request): """ 批量删除的action :param request: :return: """ pk_list = request.POST.getlist('pk') self.model_class.objects.filter(pk__in=pk_list).delete() # return HttpResponse('删除成功') multi_delete.text = "批量删除" 2. 搜索[扩展] - Q - __contains 3. 保留原搜索条件 - QueryDict,request.GET/request.POST - urlencode() - _mutable = True - 深拷贝 - urllib.parse.urlencode 4. 分页 - 分页组件 - 保留原条件 5. 拆分 - ChangeList类封装 - inclusion_tag - 生成器
完整代码,请参数github:
https://github.com/987334176/luffy_stark/archive/v1.2.zip