django-rest-framework + django-polymorphic ModelSerialization

Question

我想知道是否有人将Django REST框架与django-polymorphic相结合的Pythonic解决方案。

鉴于：

class GalleryItem(PolymorphicModel):
    gallery_item_field = models.CharField()

class Photo(GalleryItem):
    custom_photo_field = models.CharField()

class Video(GalleryItem):
    custom_image_field = models.CharField()

如果我想要django-rest-
framework中所有GalleryItem的列表，它只会给我GalleryItem（父模型）的字段，因此是：id，gallery_item_field和polymorphic_ctype。那不是我想要的
我想要custom_photo_field如果它是一个Photo实例，并且想要custom_image_field如果它是一个Video。

Answer 1

到目前为止，我仅对GET请求进行了测试，并且可以正常工作：

class PhotoSerializer(serializers.ModelSerializer):

    class Meta:
        model = models.Photo


class VideoSerializer(serializers.ModelSerializer):

    class Meta:
        model = models.Video


class GalleryItemModuleSerializer(serializers.ModelSerializer):

    class Meta:
        model = models.GalleryItem

    def to_representation(self, obj):
        """
        Because GalleryItem is Polymorphic
        """
        if isinstance(obj, models.Photo):
            return PhotoSerializer(obj, context=self.context).to_representation(obj)
        elif isinstance(obj, models.Video):
           return VideoSerializer(obj, context=self.context).to_representation(obj)
        return super(GalleryItemModuleSerializer, self).to_representation(obj)

对于POST和PUT请求，您可能需要做一些类似的事情，例如用to_internal_value def覆盖to_representation定义。