我正在使用 Django REST 框架和 django-filters,并且我想使用反向关系annotation_set
作为过滤器之一GET
使用模型的 APIDetection
。
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
这个领域不应该存在吗?
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。我可以确认newfield
存在是因为当我注释掉设置filterset_fields
.