django - Django - 通过 ManyToManyKey 从 django.contrib 的用户类访问模型

Question

我正在按照 Tuts+ 课程 [ Git Repo ]中的教学在 Django 中制作黑客新闻克隆

在views.py文件中，对于投票视图，我尝试使用此代码通过检查用户是否已经喜欢该故事来提高安全性。

@login_required
def vote(request):
    story = get_object_or_404(Story, pk=request.POST.get('story'))
    user = request.user
    if user.is_authenticated() and story not in user.liked_stories:
        story.points += 1
        story.save()
        user.liked_stories.add(story)
        user.save()
    return HttpResponse()

但它给了我这个错误：

NameError: global name 'liked_stories' is not defined
[18/Aug/2013 19:26:43] "POST /vote/ HTTP/1.1" 500 11148

我可以user.liked_stories在index视图中使用，为什么不在vote视图中？

错误：

Internal Server Error: /vote/
Traceback (most recent call last):
  File "/home/sourabh/.virtualenvs/django/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/home/sourabh/.virtualenvs/django/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 25, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/home/sourabh/Code/django_apps/HackerNews/stories/views.py", line 53, in vote
    if user.is_authenticated() and story not in liked_stories:
NameError: global name 'liked_stories' is not defined
[18/Aug/2013 20:08:35] "POST /vote/ HTTP/1.1" 500 11161

Answer 1

你去：

if user.is_authenticated() and story not in liked_stories:

在这一行中，错误被抛出。您发布的代码与您正在执行的代码不同。