Django 中 admin 的执行流程
1 循环加载执行所有已经注册的 app 中的 admin.py 文件
def autodiscover():
autodiscover_modules('admin', register_to=site)
2 执行代码
#admin.py
class BookAdmin(admin.ModelAdmin):
list_display = ("title",'publishDate', 'price')
admin.site.register(Book, BookAdmin)
admin.site.register(Publish)
3 admin.site
class AdminSite(object):
......
site = AdminSite()
这里应用的是一个单例模式,对于 AdminSite 类的一个单例模式,执行的每一个 app 中的每一个 admin.site 都是一个对象。
4 执行 register 方法
admin.site.register(Book, BookAdmin)
admin.site.register(Publish)
class ModelAdmin(BaseModelAdmin):pass
def register(self, model_or_iterable, admin_class=None, **options):
if not admin_class:
admin_class = ModelAdmin
# Instantiate the admin class to save in the registry
self._registry[model] = admin_class(model, self)
到这里,注册结束!
5 admin 的 URL 配置
urlpatterns = [
url(r'^admin/', admin.site.urls),
]
这里的 urls 其实是一个静态函数,能够返回一个元组,元组的第一个元素是 url 列表,剩下的两个元素是 Django 自配的,自配置时设为 None 即可。urls 函数如下。
class AdminSite(object):
def get_urls(self):
from django.conf.urls import url, include
urlpatterns = []
# Add in each model's views, and create a list of valid URLS for the
# app_index
valid_app_labels = []
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)),
]
if model._meta.app_label not in valid_app_labels:
valid_app_labels.append(model._meta.app_label)
return urlpatterns
@property
def urls(self):
return self.get_urls(), 'admin', self.name
6 url() 方法的扩展应用
from django.shortcuts import HttpResponse
def test01(request):
return HttpResponse("test01")
def test02(request):
return HttpResponse("test02")
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^yuan/', ([
url(r'^test01/', test01),
url(r'^test02/', test02),
],None,None)),
]
扩展优化
from django.conf.urls import url,include
from django.contrib import admin
from django.shortcuts import HttpResponse
def change_list_view(request):
return HttpResponse("change_list_view")
def add_view(request):
return HttpResponse("add_view")
def delete_view(request):
return HttpResponse("delete_view")
def change_view(request):
return HttpResponse("change_view")
def get_urls():
temp=[
url(r"^$".format(app_name,model_name),change_list_view),
url(r"^add/$".format(app_name,model_name),add_view),
url(r"^\d+/del/$".format(app_name,model_name),delete_view),
url(r"^\d+/change/$".format(app_name,model_name),change_view),
]
return temp
url_list=[]
for model_class,obj in admin.site._registry.items():
model_name=model_class._meta.model_name
app_name=model_class._meta.app_label
# temp=url(r"{0}/{1}/".format(app_name,model_name),(get_urls(),None,None))
temp=url(r"{0}/{1}/".format(app_name,model_name),include(get_urls()))
url_list.append(temp)
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^yuan/', (url_list,None,None)),
]
参考链接:https://www.cnblogs.com/yuanchenqi/articles/8323452.html