“用户”对象没有关于外键关系的属性“ get_affected_users” //

Question

I know what the error means, I have a clue why this is happening. But I don't know how to fix it and achieve my goal. Here's what I'm doing.

Users who posted something need to get notification when some other user posts comment on that something. I was able to do "notifying the person who commented when there's a reply to that comment". So, I thought I would do the same thing for the problem I'm having. But I got the above error. Here's my code.

models.py for comment

class Comment(models.Model):
    user = models.ForeignKey(MyProfile)
    parent = models.ForeignKey("self", null=True, blank=True)
    post = models.ForeignKey(Post, null=True, blank=True, related_name="commented_post")
    @property 
    def get_origin(self):
        return self.path

    @property
    def get_comment(self):
        return self.text

    @property
    def is_child(self):
        if self.parent is not None:
            return True
        else:
            return False

    def get_children(self):
        if self.is_child:
            return None
        else:
            return Comment.objects.filter(parent=self)

    def get_affected_users(self):
        """ 
        it needs to be a parent and have children, 
        the children, in effect, are the affected users.
        """
        comment_children = self.get_children()
        if comment_children is not None:
            users = []
            for comment in comment_children:
                if comment.user in users:
                    pass
                else:
                    users.append(comment.user)
            return users
        return None

get_affected_user function allows which user to get notification. (the person who created the reply shouldn't get notification, the person who got the reply should get notified).

In my views.py

def comment_create_view(request):

    form = CommentForm(request.POST)
    if form.is_valid():
        comment_text = form.cleaned_data['comment']
        if parent_comment is not None:
            # parent comments exists
            new_comment = Comment.objects.create_comment(
                user=MyProfile.objects.get(user=request.user),
                path=parent_comment.get_origin, 
                text=comment_text,
                post = post,
                parent=parent_comment
                )
            affected_users = parent_comment.get_affected_users()
            notify.send(
                    MyProfile.objects.get(user=request.user), 
                    action=new_comment, 
                    target=parent_comment, 
                    recipient=parent_comment.user,
                    affected_users = affected_users,
                    verb='replied to')
        #the above code gives reply-comment notification makes possible, the below code is the one I'm struggling
        else:
            new_comment = Comment.objects.create_comment(
                user=MyProfile.objects.get(user=request.user),
                path=origin_path, 
                text=comment_text,
                post = post
                )

This line is causing the problem, probably because I don't have get_affected_user function in my Post model, but in comment model I have post field which has a foreignkey with Post. so technically can't I use this function?

            affected_users = [post.moderator.get_affected_users()]
            notify.send(
                    MyProfile.objects.get(user=request.user), 
                    recipient = MyProfile.objects.get(user=request.user), 
                    action=new_comment, 
                    target = new_comment.post,
                    affected_users = affected_users,
                    verb='commented on')

I have get_affected_users in Comment, and in Comment I have post which has foreignKey relationship with Post and in Post I have moderator. So I thought I could've used get_affected_users for post.moderator ... But I guess not, how do I do it then?

Please excuse me if the question isn't clear. Any help will be highly appreciated.

Answer 1

I'm going to assume that Post.moderator is a FK to MyProfile just the same as Comment.user. Second, I'm going to guess that what you're trying to do is notify the moderator when a new top-level comment is created on a Post object, or a Comment with no parent set. In that case, your line should probably just be affected_users = [post.moderator] .