1.启动
#autodiscover_modules('admin', register_to=site）
2.注册
1.单例对象
admin.site = AdminSite(): 单例对象
AdminSite 源码：
class AdminSite(object): def __init__(self, name='admin'): self._registry = {} def register(self, model, admin_class=None, **options): if not admin_class: admin_class = ModelAdmin self._registry[model] = admin_class(model, self) # {Book:ModelAdmin(Book)}
ModelAdmin部分源码：
class ModelAdmin(BaseModelAdmin): list_display = ('__str__',) list_display_links = () list_filter = () search_fields = () actions = [] def __init__(self, model, admin_site): self.model = model self.opts = model._meta self.admin_site = admin_site super(ModelAdmin, self).__init__() def __str__(self): return "%s.%s" % (self.model._meta.app_label, self.__class__.__name__)
BaseModelAdmin部分源码：
def __init__(self): overrides = copy.deepcopy(FORMFIELD_FOR_DBFIELD_DEFAULTS) for k, v in self.formfield_overrides.items(): overrides.setdefault(k, {}).update(v) self.formfield_overrides = overrides
2.在admin中注册模型对象
from django.contrib import admin
1.admin.site.register(Book) # admin.site._registry={Book:ModelAdmin(Book)}
1.admin.site是AdminSite()实例化出的对象，并且是单例对象，程序中的admin.site都是同一对象，指向同一内存地址
2.admin.site.register(Book)执行类AdminSite中的register方法，参数model为注册的模型对象BOOK
3.如果只传Book，则admin_class为Django自定义类ModelAdmin
4.self._registry[model] = admin_class(model, self) 为self._registry[Book] = admin_class(Book, self)
即self._registry = {Book:ModelAdmin(Book)} Book是一个对象
5.ModelAdmin实例化出book这个表
2.admin.site.register(Publish)
继续注册另一模型对象时，仍走上述步骤，但此时 self._registry 不再为{}，而是{Book:ModelAdmin(Book)}，注册完Publisher后
admin.site._registry={Book:ModelAdmin(Book),Publish:ModelAdmin(Publish)}
3.自定义admin_class，自定的类必须继承admin。ModelAdmin
class Authoconfig(admin.ModelAdmin):pass
admin.site.register(Author, Authoconfig) admin_class=Authoconfig {Author:Authoconfig(Author)}
此时：admin.site._registry={Book:ModelAdmin(Book),Publish:ModelAdmin(Publish),Author:Authoconfig(Author)}
4.启动Django后，会自定义group和user两张表，此时打开admin页面会有五张表
5.在Django中新建app02，在admin中注册新的模型对象
在settings中： INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'app01.apps.App01Config', 'app02.apps.App02Config', ]
启动Django后，先加载admin，然后执行app01下的apps文件，自动扫描自身和其他app的admin文件，生成admin.site对象。并将app01中模型对象注册到registry中，再执行app02，加载app02
中的admin，将模型对象注册到registry中，此时registry中不为空，存放着app01注册的对象
例：在app01的admin中注册，打印查看
from django.contrib import admin # Register your models here. from app01 import models admin.site.register(models.Book) print("1====>",admin.site._registry) #此时三张表 user group book admin.site.register(models.Publish) admin.site.register(models.Author) admin.site.register(models.AuthorDetail) print("2====>",admin.site._registry) ##此时六张表 user group book Publish Author AuthorDetail 1====> {<class 'django.contrib.auth.models.Group'>:object at 0x0000018D386F2E80>, <class 'django.contrib.auth.models.User'>: object at 0x0000018D38721908>, <class 'app01.models.Book'>: object at 0x0000018D38739518>} 2====> {<class 'django.contrib.auth.models.Group'>: object at 0x0000018D386F2E80>, <class 'django.contrib.auth.models.User'>: object at 0x0000018D38721908>, <class 'app01.models.Book'>: object at 0x0000018D38739518>, <class 'app01.models.Publish'>: object at 0x0000018D38739400>, <class 'app01.models.Author'>: object at 0x0000018D38739588>, <class 'app01.models.AuthorDetail'>: object at 0x0000018D387395C0>} 在app02中注册order表 from app02 import models admin.site.register(models.Order) print("3====>",admin.site._registry) ##此时七张表 user group book Publish Author AuthorDetail order #进入admin后，能看到app01里面的表ye能看到app02的表 1====> {<class 'django.contrib.auth.models.Group'>: object at 0x0000018D386F2E80>, <class 'django.contrib.auth.models.User'>: object at 0x0000018D38721908>, <class 'app01.models.Book'>: object at 0x0000018D38739518>} 2====> {<class 'django.contrib.auth.models.Group'>: object at 0x0000018D386F2E80>, <class 'django.contrib.auth.models.User'>: object at 0x0000018D38721908>, <class 'app01.models.Book'>: object at 0x0000018D38739518>, <class 'app01.models.Publish'>: object at 0x0000018D38739400>, <class 'app01.models.Author'>: object at 0x0000018D38739588>, <class 'app01.models.AuthorDetail'>: object at 0x0000018D387395C0>} 3====> {<class 'django.contrib.auth.models.Group'>: object at 0x0000018D386F2E80>, <class 'django.contrib.auth.models.User'>: object at 0x0000018D38721908>, <class 'app01.models.Book'>: object at 0x0000018D38739518>, <class 'app01.models.Publish'>: object at 0x0000018D38739400>, <class 'app01.models.Author'>: object at 0x0000018D38739588>, <class 'app01.models.AuthorDetail'>: object at 0x0000018D387395C0>, <class 'app02.models.Order'>: object at 0x0000018D387395F8>} '''
3.路由设计
1.路由的写法：
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^zhao/', zhao),
]
2.路由分发：
拼接路由 url(r"^jerd/",([],None,None)) 后面的是元祖，在[]中写url(r'^zhao/', zhao)形式
一级路由分发 url(r"^jerd/",([],None,None))
url(r"^jerd/",([ url(r'^test1/',test1), 在网页上输入时jerd后面必须添加拼接的路径，不然显示不出来 url(r'^test2/', test2), url(r'^test3/', test3), ],None,None)),
二级路由分发 url(r"^jerd/"([url(r'^test1/',([],None,None)), ],None,None))
url(r"^jerd/", ([ url(r'^test1/', ([ url(r"^test5/", test5), url(r"^test6/", test6), ], None, None)), url(r'^test2/', test2), url(r'^test3/', test3), ], None, None)),
3.设计执行函数：
def zhao(request): return HttpResponse("这是zhaogaungfei的网页") def test1(request): return HttpResponse("这是test1的网页") def test2(request): return HttpResponse("这是test2的网页") def test3(request): return HttpResponse("这是test3的网页") def test5(request): return HttpResponse("这是test5的网页") def test6(request): return HttpResponse("这是test6的网页")
4.封装路由：
在admin中一共有7张表，每张都能进行增，删，改，查四种操作，设置相关路由操作，
#单个写的话需要28个路由。封装这些路由
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^Xadmin/', (get_urls(),None,None)),
]
封装路由
#二级路由： def get_url_2(): temp=[] temp.append(url(r"^$",list_view)) temp.append(url(r"^add/$", add_view)) temp.append(url(r"^(\d+)/change/$", change_view)) temp.append(url(r"^(\d+)/del/$", del_view)) return temp #一级路由： def get_urls(): temp=[] # 能查看在admin中刚注册的表 {Book:ModelAdmin(Book)} 字典中的Book是对象，而在路由上输入的是字符串，需要转换 print(admin.site._registry) for model,admin_class in admin.site._registry.items(): app_name=model._meta.app_label #拿到app的名字 model_name=model._meta.model_name #拿到字符串类型的表名 temp.append(url(r"^{}/{}/".format(app_name,model_name),(get_url_2(),None,None)),) return temp def list_view(request): return HttpResponse("这是查看的网页") def add_view(request): return HttpResponse("这是添加的网页") def change_view(request,id): return HttpResponse("这是编辑的网页") def del_view(request,id): return HttpResponse("这是删除的网页")