python - MultipleObjectsReturned 位于/api/rentals/gallery/1/

Question

我需要在图库 api 的详细 View 中显示多个图像，但我收到一条错误消息

MultipleObjectsReturned 位于/api/rentals/gallery/1/

get() 返回了多个图库 - 它返回了 2 个!

views.py

class GalleryListAPIView(ListAPIView):
    # queryset = Rental.objects.all()
    serializer_class = GalleryListSerializer
    pagination_class = RentalPageNumberPagination

    def get_queryset(self, *args, **kwargs):
        queryset_list = Gallery.objects.all()
        return queryset_list

class GalleryDetailAPIView(RetrieveAPIView):
    queryset = Gallery.objects.all()
    serializer_class = GalleryDetailSerializer
    lookup_field = 'rental_id'

序列化器.py

class GalleryListSerializer(ModelSerializer):
    class Meta:
        model = Gallery

class GalleryDetailSerializer(ModelSerializer):
    # image = SerializerMethodField(many=True)
    class Meta:
        model = Gallery
        fields = ('id', 'image', 'rental_id')

Answer 1

看看 documentation

lookup_field - The model field that should be used to for performing object lookup of individual model instances. Defaults to 'pk'.

由于您使用了 rental_id 并且您正在使用网址 /api/rentals/gallery/1/，此处 1 是 rental_id 而不是画廊的pk。而且，可能有两个与 rental_id=1 相关的图库对象，这就是您在结果中得到这些对象的原因。