单击按钮并刷新网站后，所有按钮都像在 Django 详细视图上选中的一样

Question

我在 django 1.11 中安装了应用程序，我在 post 的详细信息页面上对评论进行投票时遇到问题。

对于每个我想检查是否被投票赞成或否决。现在，如果我点击投票 - jquery 代码 - 仅更改此按钮以投票，投票计数器也可以正常工作，但刷新网站后，评论的所有投票按钮都像投票一样。

下面是我的代码

class Post(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    title = models.CharField(max_length=200)
    text = RichTextUploadingField()

    def __str__(self):
        return self.text

    def total_vote_up(self):
        return self.votes_up.count()

    def total_vote_down(self):
        return self.votes_down.count()


class Comment(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name='comments')
    text = RichTextUploadingField()
    votes_up = models.ManyToManyField(settings.AUTH_USER_MODEL, blank=True, related_name='up_votes')
    votes_down = models.ManyToManyField(settings.AUTH_USER_MODEL, blank=True, related_name='down_votes')

下面是我的带有评论对象的详细视图。


class PostDetail(generic.DetailView, FormMixin):
    context_object_name = 'post'
    model = Post
    form_class = CommentForm

    def get_context_data(self, **kwargs):
        is_voted_up = False
        is_voted_down = False

        comments = self.get_object().comments.all()
        for comment in comments:
            if comment.votes_up.filter(id=self.request.user.id).exists():
                is_voted_up = True
            if comment.votes_down.filter(id=self.request.user.id).exists():
                is_voted_down = True

        context = super(PostDetail, self).get_context_data(**kwargs)
        context['comments'] = self.get_object().comments.all()
        context['form'] = CommentForm(initial={'post': self.get_object(), 'author': self.get_user()})
        context['is_voted_up'] = is_voted_up
        context['is_voted_down'] = is_voted_down
        return context

Answer 1

您可能想在获取评论时对其进行注释：

votes_by_user = User.objects.filter(
   up_votes__pk=OuterRef('pk'),
   id=self.request.user.id,
)
context['comments'] = self.object.comments.all().annotate(upvoted=Exists(votes_by_user))

然后在您的模板中，每个 comment 将有一个属性 upvoted 告诉当前用户是否赞成此评论。

单击按钮并刷新网站后，所有按钮都像在 Django 详细视图上选中的一样

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python

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listview

many-to-many

django-orm