from django.utils.decorators import method_decorator

1. 加在CBV視圖的get或post方法上

 1 from django.utils.decorators import method_decorator
 2 
 3 
 4 class HomeView(View):
 5 
 6     def dispatch(self, request, *args, **kwargs):
 7         return super(HomeView, self).dispatch(request, *args, **kwargs)
 8
 
 
 9     def get(self, request):
10         return render(request, "home.html")
11     
12     @method_decorator(check_login)
13     def post(self, request):
14         print("Home View POST method...")
15         return redirect("/index/")

2. 加在dispatch方法上

 1 from django.utils.decorators import method_decorator
 
 2 
 3 
 4 class HomeView(View):
 5 
 6     @method_decorator(check_login)
 7     def dispatch(self, request, *args, **kwargs):
 8         return super(HomeView, self).dispatch(request, *args, **kwargs)
 9 
10     def get(self, request):
11         return render(request, "home.html")
12 
13     def post(self, request):
 
14         print("Home View POST method...")
15         return redirect("/index/")

因為CBV中首先執行的就是dispatch方法，所以這麽寫相當於給get和post方法都加上了登錄校驗。

3. 直接加在視圖類上，但method_decorator必須傳 name 關鍵字參數

如果get方法和post方法都需要登錄校驗的話就寫兩個裝飾器。

 1 from django.utils.decorators import method_decorator
 2 
 3 @method_decorator(check_login, name="get")
 4 @method_decorator(check_login, name="post")
 5 class HomeView(View):
 6 
 7     def dispatch(self, request, *args, **kwargs):
 8         return super(HomeView, self).dispatch(request, *args, **kwargs)
 9 
10     def get(self, request):
11         return render(request, "home.html")
12 
13     def post(self, request):
14         print("Home View POST method...")
15         return redirect("/index/")

CSRF Token相關裝飾器在CBV只能加到dispatch方法上，或者加在視圖類上然後name參數指定為dispatch方法。

備註：

• csrf_protect，為當前函數強制設置防跨站請求偽造功能，即便settings中沒有設置全局中間件。
• csrf_exempt，取消當前函數防跨站請求偽造功能，即便settings中設置了全局中間件。

   1 from django.views.decorators.csrf import csrf_exempt, csrf_protect
   2 from django.utils.decorators import method_decorator
   3 
   4 
   5 class HomeView(View):
   6 
   7     @method_decorator(csrf_exempt)
   8     def dispatch(self, request, *args, **kwargs):
   9         return super(HomeView, self).dispatch(request, *args, **kwargs)
  10 
  11     def get(self, request):
  12         return render(request, "home.html")
  13 
  14     def post(self, request):
  15         print("Home View POST method...")
  16         return redirect("/index/")

  或者：

   1 from django.views.decorators.csrf import csrf_exempt, csrf_protect
   2 from django.utils.decorators import method_decorator
   3 
   4 
   5 @method_decorator(csrf_exempt, name=‘dispatch‘)
   6 class HomeView(View):
   7    
   8     def dispatch(self, request, *args, **kwargs):
   9         return super(HomeView, self).dispatch(request, *args, **kwargs)
  10 
  11     def get(self, request):
  12         return render(request, "home.html")
  13 
  14     def post(self, request):
  15         print("Home View POST method...")
  16         return redirect("/index/")

類視圖添加裝飾器