class UserSerializer(serializers.ModelSerializer):
    first_name = serializers.CharField()
    last_name = serializers.CharField()
    email = serializers.EmailField()
    password = serializers.CharField(style={'input_type': 'password'})

    class Meta:
        model = User
        fields = '__all__'

    def create(self, validated_data):
        user = User.objects.create(
            username=validated_data.get('username'),
            email=validated_data.get('email'),
            password=validated_data.get('password')
        )
        user.set_password(validated_data.get('password'))
        user.save()
        return user

    def update(self, instance, validated_data):
        #print instance <-- if never gets here... is update not update
        for key, value in validated_data.items():
            if value:
                print value
                setattr(instance, key, value)
        instance.save()
        return instance

class UserRetrieveUpdateAPIView(generics.RetrieveUpdateAPIView):
    serializer_class = UserSerializer
    permission_classes = (IsAuthenticated, )
    queryset = User.objects.all()

    def get_object(self):
        return self.request.user

    def update(self, request, *args, **kwargs):
        serializer = UserSerializer(data=request.data, partial=True)
        serializer.is_valid(raise_exception=True)
        self.perform_update(serializer)
        instance = serializer.instance
        return Response(UserSerializer(instance=instance).data, status=status.HTTP_200_OK)