自定义admin组件

创建单例模式的几种方式：

1.__new__

2.模块的导入

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admin源码分析：

urlpatterns = [

    url(r'^admin/', admin.site.urls),
　　}

urls为一个元祖：

　　# url(r'^admin', (get_urls, None, None)),

---

单例模式：site=AdminSite() ---实例化的对象:

# 此处是部分源码

class AdminSite(object):
    def __init__(self, name='admin'):
        self._registry = {}
    def register(self, model, admin_class=None, **options):
　　　　# 如果没有提供样式类，就用默认的ModelAdmin        
　　　　if not admin_class:
    　　　　admin_class = ModelAdmin
　　　　　　# 实例化admin类以保存在注册表中
   　　　　 self._registry[model] = admin_class(model, self) 
   　　　　 # {Book:ModelAdmin(Book)}

样式类？

#  样式类
class BookConfig(admin.ModelAdmin):
　　list_display
　　list_display_links
　　search_fields
　　list_filter
　　action
admin.site.register(Book,BookConfig)

url分发：

分发：
    url(r"^admin/", ([
        # 一级分发（确定app和model）
        url(r'^app01/book/', ([
                # 二级分发(增删改查)
                url(r"^$", self.list_view),
                url(r"^add/$", self.add_view, name="add"),
                url(r"^(d+)/change/$", self.change_view, name="change")，
                url(r"^(d+)/delete/$", self.delete_view, name="delete")
                            ], None, None)),
                url(r'^test02/', test02),
                url(r'^test03/', test03),
                            ], None, None)
       )

　　

自定义admin

1.admin 参数配置