AttributeError when returning post.title in a comment model

[Ahmed Khairy]

I was working on a comment section for post and was getting an AttributeError when I return return '{}-{}'.format(self.post.title, str(self.user.username)) in the comment model

I am trying to link users and posts to the comment I am getting the same error

Here is the Models.py

class Comment(models.Model):
    post = models.ForeignKey(Post, on_delete=models.CASCADE)
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    content = models.TextField(max_length=160)
    timestamp = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return '{}-{}'.format(self.post.title, str(self.user.username))

Here is the views.py:

class PostDetailView(DetailView):
    model = Post
    template_name = "post_detail.html"

    def get_context_data(self, *args, **kwargs):
        context = super(PostDetailView, self).get_context_data()
        post = get_object_or_404(Post, slug=self.kwargs['slug'])
        comments = Comment.objects.filter(post=post).order_by('-id')
        total_likes = post.total_likes()
        liked = False
        if post.likes.filter(id=self.request.user.id).exists():
            liked = True

        if self.request.method == 'POST':
            comment_form = CommentForm(self.request.POST or None)
            if comment_form.is_valid():
                content = self.request.POST.get('content')
                comment = Comment.objects.create(
                    post=post, user=request.user, content=content)
                comment.save()
                return HttpResponseRedirect("post_detail.html")
        else:
            comment_form = CommentForm()

        context["total_likes"] = total_likes
        context["liked"] = liked
        context["comments"] = comments
        context["comment_form"] = comment_form
        return context


class PostCommentCreateView(LoginRequiredMixin, CreateView):
    model = Comment
    form_class = CommentForm




[Julio Cojom]

Try '{0}-{1}'.format(var1, var2)

Check in the console in what line it's throwing the attribute error

Rewards 

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