Re: Exception Value: Related Field got invalid lookup: value

In the views file 

in the class PostListView(ListView):

31.     def get_queryset(self, **kwargs):

32.         queryset = super(PostListView, self).get_queryset(**kwargs)

38.         return queryset.annotate(

    …

39.             total_liked=Count(

40.                 'likes',

41.                 filter=Q(likes__value="Like")

42.             )).annotate(

43.                 user_liked=Case(

44.                     When(Q(likes__user=self.request.user) & Q(

On Thursday, May 14, 2020 at 10:07:25 PM UTC-4, Motaz Hejaze wrote:

Where does this exception happen ?

In which file , which line ? 

On Fri, 15 May 2020, 12:51 am Ahmed Khairy, <ahmed.he...@gmail.com> wrote:

Hi all 

I am adding a like/unlike button for Posts in a Listview, I am getting an error: 

Exception Value:  Related Field got invalid lookup: value

here is the Model:

class Post(models.Model):      designer = models.ForeignKey(User, on_delete=models.CASCADE)      title = models.CharField(max_length=100)      likes = models.ManyToManyField(User, through="Like", related_name='liked')        def __str__(self):          return self.title        def get_absolute_url(self):          return reverse("score:post-detail", kwargs={'pk': self.pk})
    class Like(models.Model):      user = models.ForeignKey(User, on_delete=models.CASCADE)      post = models.ForeignKey(Post, on_delete=models.CASCADE)      value = models.CharField(choices=LIKE_CHOICES,                               default='Like', max_length=10)       def toggle_value(self):         if self.value == "Like":             self.value = "Unlike"         else:             self.value = "Like"        def __str__(self):          return str(self.post.pk)

the view:

def like_post(request):      user = request.user      if request.method == 'Post':          post_id = request.POST.get('post_id')          post_obj = Post.objects.get(id=post_id)                  like, created = Like.objects.get_or_create(user=user, post_id=post_id)            if not created:              like.toggle_value()              like.save()      return redirect('score:score')
class PostListView(ListView):      model = Post      template_name = "score.html"      ordering = ['-date_posted']      context_object_name = 'posts'      queryset = Post.objects.filter(admin_approved=True)      paginate_by = 5        def get_queryset(self, **kwargs):         queryset = super(PostListView, self).get_queryset(**kwargs):         return queryset.annotate(             total_liked=Count(                  'likes',                  filter=Q(likes__value="Like")             ).annotate(                  user_liked=Case(                  When(Q(likes__user=self.request.user) & Q(likes__value="Like"), then=Value(True)),                  default=Value(False),                  output_field = BooleanField()             )         )

Here is the template
{% for post in posts %}       <div style="padding-top:200 px"><strong>{{post.title}}</strong></div>           <form action="{% url 'score:like_post'%}" method='POST' class="ui form">             {% csrf_token %}             <input type='hidden' name='post_id' value=<span class="str" style="font-style: inherit; font-variant: inherit; font-weight: inh

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