CODEWITHSUNDEEP
pythondjangodjango-rest-frameworkdjango-rest-viewsets
hemo
hemo

Reputation: 110

Return NoneType on queryset django REST framework

Problem :

I am getting an error like this :

Traceback:

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/exception.py" in inner 41. response = get_response(request)

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py" in wrapped_view 58. return view_func(*args, **kwargs)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/viewsets.py" in view 87. return self.dispatch(request, *args, **kwargs)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in dispatch 474. response = self.handle_exception(exc)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in handle_exception 434. self.raise_uncaught_exception(exc)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/views.py" in dispatch 471. response = handler(request, *args, **kwargs)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/mixins.py" in list 42. page = self.paginate_queryset(queryset)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/generics.py" in paginate_queryset 172. return self.paginator.paginate_queryset(queryset, self.request, view=self)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/pagination.py" in paginate_queryset 311. self.count = _get_count(queryset)

File "/usr/local/lib/python2.7/dist-packages/rest_framework/pagination.py" in _get_count 54. return len(queryset)

Exception Type: TypeError at /api/userprofiles/ Exception Value: object of type 'NoneType' has no len()

What I am trying to do :

I just want people to get their own profile, when they connect to the api, so instead of applying UserProfile.objects.all , I thought it would be better if I used UserProfile.objects.get(user=request.user).

But as you can well see it isn't working, perhaps because pagination has some problem cause it is trying to get len() but the object it's getting is NoneType although I printed the queryset just after it's fetched so as to determine whether it really is NoneType , but it isn't.

Here's my UserProfileViewSet :

class UserProfileViewSet(viewsets.ModelViewSet):
    """
    This viewset automatically provides `list`, `create`, `retrieve`,
    `update` and `destroy` actions.
    """
    # queryset = UserProfile.objects.all(user=request.user)
    serializer_class = UserProfileSerializer
    permission_classes = (permissions.IsAuthenticatedOrReadOnly,
                          IsOwnerOrReadOnly,)
    pagination_class = LimitTenPagination

    def get_queryset(self):
        try:
            queryset = self.request.user.profile.all() # UserProfile.objects.get(user=self.request.user)
            print queryset
        except:
            queryset = None
        return queryset   # UserProfile.objects.get(user=self.request.user)

    @detail_route(renderer_classes=[renderers.JSONRenderer])
    def perform_create(self, serializer):
        serializer.save(user=self.request.user)

Upvotes: 1

Views: 1071

Answers (1)

hemo
hemo

Reputation: 110

Answer ( got it almost instantly )

Well, when I was using UserProfile.objects.get(user=self.request.user) I was getting an object , instead what I needed to get was a queryset.

So changed the queryset to queryset = UserProfile.objects.filter(user=self.request.user)

Upvotes: 0

Related Questions