问题
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.
回答1:
Okay, So finally found the solution from DRF Docs. The issue was that in case of normal ViewSet you have to override the method filter_queryset() and return the appropriate queryset accordingly. Then use the queryset under filter_queryset as mentioned by Aman -
serializer = PostListSerializer(self.filter_queryset(self.get_queryset()), many=True, context={"request": request})
Below is the code for reference for those who are still facing issues -
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
回答2:
You have overwrite the list method, so it's not working to work call the filter_queryet method.
def list(self, request, *args, **kwargs):
"""
Method for Post listing. It can be accessed by anyone.
"""
serializer = PostListSerializer(self.filter_queryset(self.get_queryset()), many=True, context= .
{"request": request})
return Response(serializer.data)
来源：https://stackoverflow.com/questions/52366296/django-filters-does-not-work-with-the-viewset