Django-filter error: 'Meta.fields' must not contain non-model field names

Question

我正在使用 Django REST 框架和 django-filters，我想使用反向关系 annotation_set 作为 GET API 使用的过滤器之一模型 Detection。型号如下：

class Detection(models.Model):
    image = models.ImageField(upload_to="detections/images")

    def local_image_path(self):
        return os.path.join('images' f"{self.id}.jpg")


class Annotation(models.Model):
    detection = models.ForeignKey(Detection, on_delete=models.CASCADE)
    attribute = models.CharField(max_length=255)

序列化器是：

class DetectionSerializer(UniqueFieldsMixin, serializers.ModelSerializer):
    local_image_path = serializers.CharField()

    class Meta:
        model = Detection
        fields = '__all__'

视图集是：


class DetectionTrainingViewSet(
        mixins.ListModelMixin,
        mixins.RetrieveModelMixin,
        viewsets.GenericViewSet
    ):
    queryset = Detection.objects.all()
    serializer_class = DetectionSerializer
    filterset_fields = ('annotation_set__id', )

    @action(methods=['GET'], detail=False)
    def list_ids(self, request):
        queryset = self.get_queryset()
        filtered_queryset = self.filter_queryset(queryset)
        return Response(filtered_queryset.values_list('id', flat=True))

当我调用端点时，出现错误：

'Meta.fields' must not contain non-model field names: annotation_set__id

该字段不应该存在吗？注意：我尝试将其他字段添加到 Annotation 模型，然后使用 annotation_set__newfield 但我仍然有错误。当我注释掉设置 filterset_fields.

的行时，我可以确认 newfield 存在，因为它被 API 正确序列化并且 return

Answer 1

查看 django 过滤器文档，您可能错过了对 DjangoFilterBackend 的引用，例如

queryset = Detection.objects.all()
serializer_class = DetectionSerializer
filter_backends = (filters.DjangoFilterBackend,)
filterset_fields = ('annotation_set__id', )

（参见：https://django-filter.readthedocs.io/en/stable/guide/rest_framework.html）

Answer 2

显然我必须明确说明反向关系的名称：

class Annotation(models.Model):
    detection = models.ForeignKey(Detection, on_delete=models.CASCADE, related_name='annotation_set')
    attribute = models.CharField(max_length=255)

如果有人知道原因，我很想知道！谢谢！

Django-filter error: 'Meta.fields' must not contain non-model field names

Django-filter error: 'Meta.fields' must not contain non-model field names

python

django

filter

django-rest-framework

django-filter