Django内置Admin

一、Admin的运行原理:

admin相当于一个app,它的源码中预设admin/login等url.

admin.site.register(models.UserInfo)注册数据表原理:
在python manage.py runserver 时,自动调用所有app中的admin.py,然后调用site.register方法,site为源码中AdminSite()对象,然后判断register方法括号内的参数是否继承自ModelBase类,models.Model就继承于ModelBase,如果是,将它转换为可迭代对象,
然后通过for循环生成一个字典并保存:_registry = {
models.UserInfo: admin.ModelAdmin(models.UserInfo,admin.site)
models.UserGroup: admin.ModelAdmin(models.UserGroup,admin.site)
而当程序运行起来后,读取配置文件,ROOT_URLCONF = 'DjangoAdmin.urls', 会触发admin.site.urls执行,通过return的 self.get_urls()方法,
先注册预设的url,然后循环之前生成的字典_registry.items(),拼接生成每个models类单独的url地址,通过访问唯一生成的地址,
渲染成页面展示给用户,在include中的model_admin.urls方法则是通过分发add、change等路径 wrap一个个函数对数据表进行操作
for model, model_admin in self._registry.items():
               urlpatterns += [
                  url(r'^%s/%s/' % (model._meta.app_label, model._meta.model_name), include(model_admin.urls)),
                  app01/userinfo/
               ]
               if model._meta.app_label not in valid_app_labels:
                  valid_app_labels.append(model._meta.app_label)

  

二、Admin的使用

 

from django.contrib import admin
					from app01 import models
					admin.site.register(models.UserInfo,admin.ModelAdmin)
					admin.site.register(models.UserGroup,admin.ModelAdmin)
	
urlpatterns = [
        url(r'^admin/', admin.site.urls),
    ]
			
					
#基于装饰器
# @admin.register([models.UserInfo,])                # 第一个参数可以是列表
# class UserAdmin(admin.ModelAdmin):
#     # list_display = ('user', 'pwd',)
#     pass

 

  


5. list_display
list_display = ('user', 'email', yuhao)

内部原理:

from types import FunctionType
def yuhao():
# print(obj.user)
    return '小于浩'

list_display = ('user', 'email', yuhao)

for item in list_display:
    if isinstance(item,FunctionType):
        print(item())
    else:
	print(item)

  


...

15. 定制模板时
add_form_template = None
change_form_template = None
change_list_template = None
delete_confirmation_template = None
delete_selected_confirmation_template = None
object_history_template = None


from django.template.response import TemplateResponse
test_template = None


def test(request):
# print(models.UserInfo._meta.app_label)
# print(models.UserInfo._meta.model_name)
# if test_template:
# return render(request,test_template)
# else:
# return HttpResponse('...')

return TemplateResponse(request,[] or ['xiaohaohao.html','my_change_list.html'],{'k1':'v1'})


Admin开发: http://www.cnblogs.com/wupeiqi/articles/7444717.html

 

posted @ 2017-09-06 20:00  Mitsuis  阅读(196)  评论(0编辑  收藏  举报