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 admin1.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。ModelAdminclass Authoconfig(admin.ModelAdmin):passadmin.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‘>: <django.contrib.auth.admin.GroupAdmin object at 0x0000018D386F2E80>, <class ‘django.contrib.auth.models.User‘>: <django.contrib.auth.admin.UserAdmin object at 0x0000018D38721908>, <class ‘app01.models.Book‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739518>}
2====> {<class ‘django.contrib.auth.models.Group‘>: <django.contrib.auth.admin.GroupAdmin object at 0x0000018D386F2E80>, <class ‘django.contrib.auth.models.User‘>: <django.contrib.auth.admin.UserAdmin object at 0x0000018D38721908>, <class ‘app01.models.Book‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739518>, <class ‘app01.models.Publish‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739400>, <class ‘app01.models.Author‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739588>, <class ‘app01.models.AuthorDetail‘>: <django.contrib.admin.options.ModelAdmin 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‘>: <django.contrib.auth.admin.GroupAdmin object at 0x0000018D386F2E80>, <class ‘django.contrib.auth.models.User‘>: <django.contrib.auth.admin.UserAdmin object at 0x0000018D38721908>, <class ‘app01.models.Book‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739518>}
2====> {<class ‘django.contrib.auth.models.Group‘>: <django.contrib.auth.admin.GroupAdmin object at 0x0000018D386F2E80>, <class ‘django.contrib.auth.models.User‘>: <django.contrib.auth.admin.UserAdmin object at 0x0000018D38721908>, <class ‘app01.models.Book‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739518>, <class ‘app01.models.Publish‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739400>, <class ‘app01.models.Author‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739588>, <class ‘app01.models.AuthorDetail‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D387395C0>}
3====> {<class ‘django.contrib.auth.models.Group‘>: <django.contrib.auth.admin.GroupAdmin object at 0x0000018D386F2E80>, <class ‘django.contrib.auth.models.User‘>: <django.contrib.auth.admin.UserAdmin object at 0x0000018D38721908>, <class ‘app01.models.Book‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739518>, <class ‘app01.models.Publish‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739400>, <class ‘app01.models.Author‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D38739588>, <class ‘app01.models.AuthorDetail‘>: <django.contrib.admin.options.ModelAdmin object at 0x0000018D387395C0>, <class ‘app02.models.Order‘>: <django.contrib.admin.options.ModelAdmin 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")
原文地址：https://www.cnblogs.com/zgf-666/p/9129683.html
时间： 2024-08-30 11:48:39