Django过滤器不适用于Viewset [英] Django-filters does not work with the Viewset

问题描述

我一直在尝试使用 django-filters ，但是对象没有被过滤.另外，该权限不适用于 partial_update 视图

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

我有一个Viewset，它具有一些基本动作，例如-list()，retrieve()，destroy()，partial_update()和其他一些动作，并尝试对其应用过滤器.

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.

经过一些研究，我发现由于我是通过过滤器创建查询集的，所以我将不得不覆盖 get_queryset()方法.但是，这似乎也不起作用.过滤器仅适用于 ModelViewSet 或 ListApiView 吗?

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

权限-

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', )

经理-

class PostManager(models.Manager):

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

任何帮助将不胜感激.

推荐答案

好吧，所以终于从 Aman 所述在 filter_queryset 下的 queryset --

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})

以下是仍面临问题的人员的参考代码-

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

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