在django的同一个基于类的视图中使用不同的权限装饰器

Question

我最近在我的Django应用程序中切换到基于类的视图，并希望尽可能优雅地使用它们。在应用程序中，我有一个评论系统，如果权限匹配，管理员应该能够删除和/或发布/取消发布评论。我写了一个RedirectView，包括功能：

class CommentChangeView(RedirectView, SingleObjectMixin): 
    """ 
    A redirection that acts on a Comment. The url parameter 
    "action" is taken as a class function and executed. 
    """ 

    model = Comment 


    def get_redirect_url(self, pk): 
     """ 
     Redirect to the article page, always. 
     """ 
     return reverse('post', args=(self.object.post.slug,)) 


    def get(self, *args, **kwargs): 
     """ 
     Here, it is decided what to execute. 
     """ 

     self.object = self.get_object() 
     func = getattr(self, kwargs.pop('action', None), None) 

     if callable(func): 
      func() 

     return super(CommentChangeView, self).get(*args, **kwargs) 

    @method_decorator(permission_required('blog.delete_comment')) 
    def delete(self): 
     """ 
     Delete the comment 
     """ 

     self.object.delete() 
     messages.success(self.request, 'Comment deleted.') 

    @method_decorator(permission_required('blog.change_comment')) 
    def toggle_publish(self): 
     """ 
     Toggle its publication state 
     """ 

     self.object.published = not self.object.published 
     self.object.save() 
     messages.success(self.request, 'Comment toggled.') 

现在的问题是，我想这两个动作有不同的权限 - 因此不同的装饰。通常，dispatch函数是装饰的。上面的代码不起作用，我得到TypeError。没有装饰者，它完美的作品。

我该如何实施这种情况？还是应该分开删除和发布的意见？

---

这里是TypeError的堆栈跟踪：

Internal Server Error: /comment/toggle_publish/1/ 
Traceback (most recent call last): 
    File "/***/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response 
    response = callback(request, *callback_args, **callback_kwargs) 
    File "/***/lib/python2.7/site-packages/django/views/generic/base.py", line 68, in view 
    return self.dispatch(request, *args, **kwargs) 
    File "/***/lib/python2.7/site-packages/django/views/generic/base.py", line 86, in dispatch 
    return handler(request, *args, **kwargs) 
    File "/***/blog/blog/views.py", line 186, in get 
    func() 
    File "/***/lib/python2.7/site-packages/django/utils/decorators.py", line 25, in _wrapper 
    return bound_func(*args, **kwargs) 
TypeError: _wrapped_view() takes at least 1 argument (0 given) 

Answer 1

Bibhas指出我到正确的方向上，更加紧密地看着堆栈跟踪。通过引入一个额外的函数参数，我能够得到它的工作。此代码现在可用：

class CommentChangeView(RedirectView, SingleObjectMixin): 
    """ 
    A redirection that acts on a Comment. The url parameter 
    "action" is taken as a class function and executed. It therefore 
    combines the delete and publish_comment functions (and, later, possibly) 
    more. 
    """ 

    model = Comment 


    def get_redirect_url(self, pk): 
     """ 
     Redirect to the article page, always. 
     """ 
     return reverse('post', args=(self.object.post.slug,)) 


    def get(self, request, *args, **kwargs): 
     """ 
     Here, it is decided what to execute. 
     """ 

     self.object = self.get_object() 
     func = getattr(self, kwargs.pop('action', None), None) 

     if callable(func): 
      func(request) 

     return super(CommentChangeView, self).get(request, *args, **kwargs) 

    @method_decorator(permission_required('blog.delete_comment')) 
    def delete(self, request): 
     """ 
     Delete the comment 
     """ 

     self.object.delete() 
     messages.success(self.request, 'Comment deleted.') 

    @method_decorator(permission_required('blog.change_comment')) 
    def toggle_publish(self, request): 
     """ 
     Toggle its publication state 
     """ 

     self.object.published = not self.object.published 
     self.object.save() 
     messages.success(self.request, 'Comment toggled.')