python - Django-filters does not work with the Viewset

Question

I have been trying to use django-filters but the objects are not getting filtered. Also, the permission is not working for the partial_update views

I have a Viewset which has the basic actions like - list(), retrieve(), destroy(), partial_update() and few other actions, and trying to apply filter for the same.

After some research I found that since I am creating the queryset via filters I will have to override the get_queryset() method. However, that also doesn't seem to be working. Does the filter works only with ModelViewSet or ListApiView?

ViewSet -

class PostViewSet(viewsets.ViewSet):
"""
The Endpoint to list, retrieve, create and delete Posts.

"""
filter_backends = (DjangoFilterBackend, )
# filterset_class = PostFilter
filter_fields = ('pet_age', 'pet_gender', 'breed')

def get_permissions(self):

    if self.action == 'partial_update' or self.action == 'update':
        permission_classes = [IsPostAuthor, ]

    elif self.action == 'create' or self.action == 'destroy':
        permission_classes = [IsAuthenticated, ]

    else:
        permission_classes = [AllowAny, ]

    return[permission() for permission in permission_classes]

def get_queryset(self):
    return Post.objects.active() # This is implemented via custom Manager

def list(self, request, *args, **kwargs):
    """
    Method for Post listing. It can be accessed by anyone.
    """

    serializer = PostListSerializer(self.get_queryset(), many=True, context={"request": request})

    return Response(serializer.data)
# REST CODE TRUNCATED

Permission -

class IsPostAuthor(permissions.BasePermission):
"""
Object-level permission to only allow owners of an object to edit it.
"""

def has_object_permission(self, request, view, obj):
    if request.user.is_authenticated:
        if view.action in ['partial_update', 'update']:
            return obj.user.id == request.user.id
        return False

    return False

PostFilter -

class PostFilter(filters.FilterSet):

class Meta:
    model = Post
    fields = ('pet_age', 'pet_gender', 'breed', )

Manager -

class PostManager(models.Manager):

def active(self):
    return self.filter(post_status='Active')

Any help will be highly appreciated.

标签： pythondjangodjango-rest-frameworkdjango-filterdjango-rest-viewsets

Answer 1

好的，所以终于从DRF Docs找到了解决方案。问题是在普通 ViewSet 的情况下，您必须覆盖方法filter_queryset ()并相应地返回适当的查询集。然后使用Aman提到的filter_queryset下的查询集-

serializer = PostListSerializer(self.filter_queryset(self.get_queryset()), many=True, context={"request": request})

以下是供那些仍然面临问题的人参考的代码 -

filter_queryset -

def filter_queryset(self, queryset):
    filter_backends = (DjangoFilterBackend, )

    # Other condition for different filter backend goes here

    for backend in list(filter_backends):
        queryset = backend().filter_queryset(self.request, queryset, view=self)
    return queryset