django-admin常用知识点记录

1,格式化时间

def showtime(self):  
    return self.create_time.strftime('%Y/%m/%d') 
showtime.short_description="创建时间"  
#更改列名,否则显示的是showtime名称 showtime.admin_order_field="create_time" #指定方法的数据按照模型的字段排序

2,获取关联数据

 #获取关联数据,以 1,2,3,列表格式显示

查看代码
 def hero_link(self):
  return [ obj.hname for obj in self.hero.all()]​
@admin.register(Hero)
class HeroAdmin(admin.ModelAdmin, ExportCsvMixin):
    ...
    def children_display(self, obj):
        return ", ".join([
            child.name for child in obj.children.all()
        ])
    children_display.short_description = "Children"

3,获取关联数据统计:跟进次数统计

#在销售机会表models.py下填写    
def (self):        
    num=FollowList.objects.filter(user=self.pk,status=2).count()        
    return  num    
follow_num.short_description="跟进次数"

4,详情页竖直列表样式

class HeroInfoStackInline(admin.StackedInline):   
    model=HeroInfo #要编辑的对象   
    extra =1 #附加编辑的数量
inlines=[HeroInfoStackInline] #继承

5,客服归属问题

查看代码
 #此处可自动选择登录用户为归属客服,避免可看到后台所有用户名
    #除超级管理员,其他人只能看到自己
def formfield_for_foreignkey(self, db_field, request, **kwargs):
    if db_field.name == 'kefu' and not request.user.is_superuser:
        kwargs['queryset'] = models.UserProfile.objects.filter(username=request.user.username)
    return super(SalesOpportunityAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs)
       #除超级管理员,其他人只能看到自己
def get_readonly_fields(self, request, obj=None):
    if obj is not None and not request.user.is_superuser:
             return self.readonly_fields + ('kefu',)
    return self.readonly_fields
def add_view(self, request, form_url="", extra_context=None):
            data = request.GET.copy()
            data['kefu'] = request.user.username
            request.GET = data
            return super(SalesOpportunityAdmin, self).add_view(request, form_url="", extra_context=extra_context)

6,通过get_redonly_fields动态获取只读字段

readonly_fields=('operator','modified')
def get_readonly_fields(self,request,obj=None):    
    #如果实例存在,则修改。某些字段不允许修改     
    if obj:        
        return ('stock','gift','op','amount','operator','modified')   
    #如果实例不存在,则新增。某些字段不允许修改       else:          return self.readonly_fields

7,显示单选按钮radio模式

#可以让性别处显示的是单选按钮radio模式    
radio_fields={'gender':admin.HORIZONTAL,}

8,自定义按钮

@admin.display(ordering="username", description="操作")
def operate(self):
      # 新标签中打开修改界面,url可以随意指定
    data = '{"name":"%s","icon":"fas fa-user-tie","url":"/admin/app01/userprofile/%d/change/"}' % (
            self.username, self.pk)
btn1 = f"""<button onclick='self.parent.app.openTab({data})' class='el-tag el-tag--small el-tag--dark'><i class="el-icon-edit"></i>修改</button>"""
       
        return mark_safe(f"<div> {btn1} </div>")

"""

9,如何在Django admin中优化查询?

旧的

@admin.register(Origin)  
class OriginAdmin(admin.ModelAdmin):      
    list_display = ("name", "hero_count", "villain_count")   
    def hero_count(self, obj):        
        return obj.hero_set.count()   
    def villain_count(self, obj):        
        return obj.villain_set.count()
#新的

@admin.register(Origin)   
class OriginAdmin(admin.ModelAdmin):      
    list_display = ("name", "hero_count", "villain_count")   
    def get_queryset(self, request):        
        queryset = super().get_queryset(request)        
        queryset = queryset.annotate(_hero_count=Count("hero", distinct=True),_villain_count=Count("villain", distinct=True),)        
        return queryset   
    def hero_count(self, obj):        
        return obj._hero_count   
    def villain_count(self, obj):        
        return obj._villain_count

10,在用户详情页头像处显示图片,插件模式

参考链接:https://www.likecs.com/ask-376823.html

需要导入的库

from django.db import models 
from django.contrib.admin.widgets import AdminFileWidget

插件代码admin.py中

查看代码
 class CustomAdminFileWidget(AdminFileWidget):    
    def render(self, name, value, attrs=None, renderer=None):        
        result = []        
        if hasattr(value, "url"):            
            result.append(f'''<a href="{value.url}" target="_blank"><img src="{value.url}" alt="{value}" width="100" height="100"/> </a>''')        
            result.append(super().render(name, value, attrs, renderer))        
            return format_html("".join(result))
在对应的userprofileadmin的添加
formfield_overrides = {# Here        
    models.models.ImageField: {"widget": CustomAdminFileWidget}   }

11,归属客服显示真实姓名:

def full_name(self):      
    return  self.last_name+self.first_name 
def __str__(self):      
    return self.full_name() #外键在调用的时候显示的是姓名而非用户名

12,多选框的使用

第一种方法:

其中主要使用了MultiSelectField模块,模块项目地址:https://github.com/goinnn/django-multiselectfield

models.py:

from django.db import models 
from multiselectfield import MultiSelectField 
# Create your models here. pip install django-multiselectfield 
class test_table(models.Model):    
    language_choices = (('chinese', u'汉语'), ('english', u'英语'), ('french', '法语'))    
    language = MultiSelectField(u"使用语言", choices=language_choices,null=True

第二种方法:

def formfield_for_manytomany(self, db_field, request=None, **kwargs):    
    if db_field.name == 'your field name':        
        kwargs['widget'] = form_widgets.CheckboxSelectMultiple()        
        kwargs['help_text'] = ''    return db_field.formfield(**kwargs)

13,正整数模型(Positive)

PositiveIntegerField() #IntegerField一样,但只包含正整数

14,数字验证,手机号码验证,不允许负数

在models.py模型中

validators=[RegexValidator(r'^1[356789]\d{9}$', "手机号码格式不正确")], 
#PositiveSmallIntegerField 正整数

15,自定义字段判断:

查看代码
 def colored_status(self):    
    if self.status_id == 5:        
        color_code = 'el-tag el-tag--small el-tag--danger el-tag--dark'    
    elif self.status_id == 4:        
        color_code = 'el-tag el-tag--small el-tag--success el-tag--dark'    
    else:        
        color_code = 'el-tag el-tag--small el-tag--dark'    
    return format_html('<span class="{}">{}</span>',
                       color_code,        
                       self.status.name,   
                      ) 
colored_status.short_description = u"状态"

 

posted @ 2023-03-23 13:16  super_ip  阅读(52)  评论(0编辑  收藏  举报