Django: HttpResponse in RetrieveAPIView giving an AttributeError - django

Question

I'm trying to create API for liking a post. This works for liking a post
but I get error when adding the return HttpResponse/Response statements gives an error:
AttributeError at /api/posts/like/4/
'HttpResponse' object has no attribute 'model'
Request Method: GET
Request URL: http://127.0.0.1:8000/api/posts/like/4/
Django Version: 2.0.7
views.py
class LikeDetailAPIView(RetrieveAPIView):
serializer_class = PostSerializer
def get_queryset(self):
user = self.request.user
post_id = self.kwargs['pk']
like = Like(post=Post.objects.get(id=post_id), user=user)
user_like = Like.objects.filter(post=post_id, user=user)
if user_like.exists():
user_like.delete()
content = {'message': 'unliked'}
return Response(content, status=status.HTTP_202_ACCEPTED)
else:
like.save()
content = {'message': 'like'}
return Response(content, status=status.HTTP_202_ACCEPTED)
urls.py
url(r'^like/(?P<pk>.+)/$',LikeDetailAPIView.as_view(), name='likeapi'),
What I am intending to do is return a success message.
serializer.py
class LikeListSerializer(serializers.ModelSerializer):
class Meta:
model = Like
fields = [
'user',
'post',
'time',
]
Any links that I can refer to?

Answer 1

From the official DRF doc,
get_queryset(self) method returns the queryset that should be used for list views, and that
should be used as the base for lookups in detail views. Defaults
to returning the queryset specified by the queryset attribute.
From your comments, I understood that, you need to show some response when you access the API (detail-view).
Since you are using RetrieveAPIView class, you have to override retrieve() method, as
from rest_framework.generics import RetrieveAPIView
class LikeDetailAPIView(RetrieveAPIView):
serializer_class = PostSerializer
def get_queryset(self):
return Like.objects.filter(post=self.kwargs['pk'], user=self.request.user)
def retrieve(self, request, *args, **kwargs):
if self.get_queryset().exists():
self.get_queryset().delete()
content = {'message': 'unliked'}
return Response(content, status=status.HTTP_202_ACCEPTED)
like = Like(post=Post.objects.get(id=post_id), user=user)
like.save()
content = {'message': 'like'}
return Response(content, status=status.HTTP_202_ACCEPTED)
Now you can access the endpoint, /api/posts/like/4/ by HTTP GET method