最近我一直在为我的课程做一个董事会项目。我为某个模型写了一个deleteview。它工作了一段时间，然后它开始给我404错误。下面我将附上我的代码和整个视图和URL。
ps：我知道我不应该给出所有这些，但是谁知道呢，也许你可以帮我解决其他的错误
views.py

class Post_list(LoginRequiredMixin, ListView):
    model = Post
    template_name = 'Post/list_of_posts.html'
    context_object_name = 'Posts'

    def get_context_data(self, *args,**kwargs):
        cat_menu = Category.objects.all()
        context = super(Post_list, self).get_context_data(*args,**kwargs)
        context["cat_menu"] = cat_menu
        return context

class Post_details(LoginRequiredMixin, DetailView):
    model = Post
    template_name = 'Post/post_details.html'
    context_object_name = 'Post'

class Post_create(LoginRequiredMixin, CreateView):
    model = Post
    template_name = 'Post/post_create.html'
    form_class = PostForm

class Post_update(LoginRequiredMixin, UpdateView):
    template_name = 'Post/post_update.html'
    form_class = EditForm
    context_object_name = 'Post'

    def get_object(self,**kwargs):
        # Here we are getting the id so Django could stalk the change
        ID = self.kwargs.get('pk')
        return Post.objects.get(pk=ID)

class Post_delete(LoginRequiredMixin, DeleteView):
    template_name = 'Post/post_delete.html'
    queryset = Post.objects.all()
    context_object_name = 'Post'
    success_url = '/Posts'

def CategoryView(request, cats):
    category_posts = Post.objects.filter(cat=1)
    return render(request, 'Post/categories.html', {'cats': cats,
                                                    'category_posts': category_posts})

class Add_comment(LoginRequiredMixin, CreateView):
    model = Comments
    template_name = 'Post/add_comment.html'
    form_class = CommentForm
    success_url = '/Posts'

    def form_valid(self, form):
        form.instance.Post_id = self.kwargs['pk']
        return super().form_valid(form)

class CommentEdit(LoginRequiredMixin, UpdateView):
    template_name = 'Post/edit_comment.html'
    form_class = CommentEditForm
    context_object_name = 'comments'

    def get_object(self,**kwargs):
        # Here we are getting the id so Django could stalk the change
        ID = self.kwargs.get('pk')
        return Post.objects.get(pk=ID)

class CommentDelete(LoginRequiredMixin, DeleteView):
    model = Comments
    template_name = 'Post/comment_delete.html'
    queryset = Comments.objects.all()
    context_object_name = 'comments'
    success_url = '/Posts'

url.py

urlpatterns = [
    path('', Post_list.as_view()),
    path('<int:pk>', Post_details.as_view(), name='post_details'),
    path('add/', Post_create.as_view(), name='post_create'),
    path('<int:pk>/edit', Post_update.as_view(), name='post_update'),
    path('<int:pk>/delete', Post_delete.as_view(), name='post_delete'),
    path('Category/<str:cats>/', CategoryView, name='category'),
    path('<int:pk>/comment/', Add_comment.as_view(), name='add_comment'),
    path('<int:pk>/comment/edit', CommentEdit.as_view(), name='edit_comment'),
    path('<int:pk>/deletecomment', CommentDelete.as_view(), name='delete_comment'),
]