在Django Rest API中的Serializer方法内检索当前用户

Question

I have a serializer for user profiles in Django Rest:

class UserProfileSerializer(serializers.ModelSerializer):
    ......................
    ......................
    status = serializers.SerializerMethodField()
    def get_status(self, obj):
        user =  self.context['request'].user
            if obj.user.userprofile in user.followed_userprofiles_set.all():
                return "following"
            else:
                return "notfollowing"
    class Meta:
        model = UserProfile
        fields = (...., 'status',...)

And I have two views that use this serializer:

class Followers(APIView):

    def get(self, request, format=None):
        #user who follow current user
        users = request.user.userprofile.followers.all()
        userprofiles= UserProfile.objects.filter(user__in=users)
        serializer = UserProfileSerializer(userprofiles, many=True)
        return Response(serializer.data)

and

class Friends(mixins.ListModelMixin, generics.GenericAPIView):

    queryset = UserProfile.objects.all()
    serializer_class = UserProfileSerializer
    permission_classes = (permissions.IsAuthenticated,)

    def get(self, request, *args, **kwargs):
        return self.list(request, *args, **kwargs)

    def get_queryset(self):
        .................
        .................
        return queryset

One view is using APIView and other is using genericAPIView. When i request from genericAPIView, its working properly. But when i request from APIView, its giving me key error. How to retrieve the current user inside serializer method when APIView is used?

Answer 1

Since you are manually instantiating the UserProfileSerializer in your APIView class without passing the context , KeyError exception gets raised.

You should pass the request in context parameter when instantiating the UserProfileSerializer in your APIView .

class Followers(APIView):

    def get(self, request, format=None):
        #user who follow current user
        users = request.user.userprofile.followers.all()
        userprofiles= UserProfile.objects.filter(user__in=users)
        context = {'request':request} # prepare serializer context
        serializer = UserProfileSerializer(userprofiles, many=True, context=context) # pass context
        return Response(serializer.data)