[Django]-Django Rest Framework – "detail": "Not found."

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17👍

✅

Firstly, you need to return a queryset in get_queryset() method.

Also, you have incorrectly defined lookup_url_kwarg as uuid. It should infact be user_id as this url kwarg value is used to perform lookup for uuid lookup_field in the queryset returned from the get_queryset() method.

The default value for lookup_url_kwarg if unset is the same value as lookup_field. So, we don’t need to define lookup_url_kwarg even. It will be computed from lookup_field.

class MemberDetail(mixins.RetrieveModelMixin,
                   mixins.DestroyModelMixin,
                   mixins.UpdateModelMixin,
                   generics.GenericAPIView):
    serializer_class = GroupMembersSerializer
    lookup_field = "user_id" # no need to define 'lookup_url_kwarg' as both have same value

    def get_queryset(self):
        group = self.kwargs["uuid"]
        return GroupMember.objects.filter(group = group) # return a queryset

In the get_queryset() method, we just filter using the group and not by user_id as this will be performed by DRF itself whenever there is a retrieve request.

Using .get() on a queryset will return an object and not a queryset. To perform filtering based on the value of lookup_field, we need a queryset. Now, .filter() returns a queryset so we used that here.

Note: When you returned GroupMember.objects.filter(group = group, user_id = user_id), the retrieve tried to perform lookup on this returned queryset on the user_id field with its value as lookup_url_kwarg value i.e. user_id=25010a31-fc5b-47c8-9c5c-d740e5743f52. Since no such object exists in that queryset, it returned that error.

👤Rahul Gupta

9👍

In my case in my routers.py file I had written it like this

router.register(r'',PersonViewSet)
router.register(r'PersonEmployee',PersonEmployeeViewSet)

so I changed it to

router.register(r'PersonEmployee',PersonEmployeeViewSet)
router.register(r'',PersonViewSet)

It was reading the empty path URL first and throwing detail not found, so I kept router with the empty path at last and it worked fine.

👤Harvindar Singh Garcha

3👍

normally this error appears when you installed Django rest framework datatables, please check the next values on the configuration of Rest Framework on your settings:

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.TokenAuthentication',
        'rest_framework.authentication.SessionAuthentication',
    ),
    'DEFAULT_RENDERER_CLASSES': (
        'rest_framework.renderers.JSONRenderer',
        'rest_framework.renderers.BrowsableAPIRenderer',
        'rest_framework_datatables.renderers.DatatablesRenderer',
    ),
    'DEFAULT_FILTER_BACKENDS': (
        'rest_framework_datatables.filters.DatatablesFilterBackend',
    ),
    'DEFAULT_PAGINATION_CLASS': 'rest_framework_datatables.pagination.DatatablesPageNumberPagination',
    'PAGE_SIZE': 50,
    'EXCEPTION_HANDLER': 'utils.rest_framework.views.exception_handler'
}
👤direyes

1👍

Just wanted to add. In the case I was looking at the queryset wasn’t returning a queryset with the expected object, so in terms of what the changes would look like for your question:

class MemberDetail(generics.GenericAPIView):
    serializer_class = GroupMembersSerializer
    queryset = GroupMember.objects.filter(...)

changed to:

queryset = GroupMember.objects.all()
👤jmunsch

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