如何在基于 Django Class 的创建视图中限制每个用户每 24 小时只允许 post 一次

Question

在views.py中：

class AddPostView(LoginRequiredMixin, CreateView):
    login_url = '/member/login'
    model=Post
    form_class = PostForm
    template_name='post/addpost.html'
    def form_valid(self, form):
        form.instance.poster = self.request.user
        return super(AddPostView, self).form_valid(form)

在forms.py

class PostForm(forms.ModelForm):
  class Meta:
      model = Post
      fields = ('title','somefields...')
      labels = {'somelabels': '...'}
      widgets = {'some css attributes....'}
      def has_posted_today(self):
          yesterday = timezone.now() - timezone.timedelta(hours=24)
          poster = self.cleaned_data.get('poster')
          if Post.objects.filter(poster=poster, post_date__gt=yesterday).exists():
              raise forms.ValidationError("You have already posted today, Come back tomorrow!")

在models.py

class Post(models.Model):
    title = models.CharField(max_length=100)
    poster = models.ForeignKey(User, on_delete=models.CASCADE)
    post_date = models.DateTimeField(default=timezone.now, blank=True)
    ...somefields = ...somemodels

如果这是一个基于函数的视图，我想解决方案将类似于...

if request.method == "POST":
    yesterday = timezone.now() - timezone.timedelta(days=1)
    if Post.objects.filter(poster=request.user, post_date__gt=yesterday).exists():
        return HttpResponseForbidden("You have already posted today, Come back tomorrow!")

第一个问题，我的代码不工作....我如何让它工作....

第二个问题，如何在基于 django class 的视图中执行 HttpResponseForbidden 操作。

Answer 1

在views.py中：

class AddPostView(UserPassesTestMixin, LoginRequiredMixin, CreateView):
    login_url = '/member/login'
    model=Post
    form_class = PostForm
    template_name='post/addpost.html'
    def test_func(self):
        yesterday = datetime.now() - timedelta(day=1)
        #print to see which time is correct.
        print('this is yesterday...', yesterday)
        print('this is timezone.now()...', timezone.now())
        print('this is daytime.now()...', datetime.now())
        if Post.objects.filter(poster=self.request.user, post_date__gt=yesterday).exists():
            raise PermissionDenied("You have made your post today, Please come back later")
            return False
        else:
            return True
    def form_valid(self, form):
        form.instance.poster = self.request.user
        return super(AddPostView, self).form_valid(form)

在403.html中：

{%extends 'base.html'%}
{%block content%}
    {%if exception%}
        <h1>{{exception}}</h1>
    {%else%}
        <h1>Somethings Wrong!</h1>
    {%endif%}
{%endblock%}

如何在基于 Django Class 的创建视图中限制每个用户每 24 小时只允许 post 一次

How to limit each user to only allowed to post once every 24 hours in Django Class Based Create View

python

django

django-models

django-views

django-class-based-views