Django's CBV decorator method_decorator

PS: Add decorator to CBV

　　　　def wrapper(func):

　　　　　　def inner(*args,**kwargs):

　　　　　　　　return func(*args,**kwargs)

　　　　　　return inner

　　　　#1. Add a decorator to the specified method

　　　　　　class Foo(View):

　　　　　　　　@method_decorator(wrapper)

　　　　　　　　def get(self,request):

　　　　　　　　　　pass

　　　　　　　　def post(self,request):

　　　　　　　　　　pass

　　　　2. Add on the class

　　　　　　@method_decorator(wrapper,name='dispatch')

　　　　　　class Foo(View):

　　　　　　　　def get(self,request):
　　　　　　　　　　pass

　　　　　　　　def post(self,request):

　　　　　　　　　　pass

#CBV code

# 1. Routing system 
urlpatterns = [
    url(r'^login.html$', views.Login.as_view()),
]

# 2.views类
"""
    get check
    post creation
    put update
    delete delete
""" 
#Automatically execute the corresponding function according to the method of request.method. 
#We can rewrite the dispatch function to achieve a similar effect as a decorator, and the dispatch internally implements function execution according to reflection. 
from django.views import View

class Login(View):
    def get(self,request):
        return render(request, "login.html")

    def post(self, request):
        name = request.POST.get("user")
        print(name)
        return HttpResponse("from post ")
    
    def dispatch(self, request, *args, **kwargs):
        print("-----before------")
        ret = super().dispatch(request,*args,**kwargs)
        print("-----after------")
        return ret

# # CBV application decorator 
# django bug, you cannot decorate the class directly, you must use method_decorator, and pass the decorator as a parameter. 
from django.utils.decorators import method_decorator
@method_decorator(wrapper, name="post")