Question

在我的Django应用程序（使用drf）中，我已经修改了模型的序列化器以获取前端所需的输入，但是运气不好，试图将此序列化器嵌套在另一个序列化器中。

我尝试使用to_representation方法创建模型的字段并放置get_photos方法，但这些都不是什么。

# models.py

class Photo(models.Model):
    photo = models.OneToOneField(RawPhoto, related_name='contest_photo', on_delete=models.CASCADE)
    thumbnail_size = models.OneToOneField(PhotoSize, related_name='contest_photo', on_delete=models.CASCADE)
    thumbnail_url = models.TextField(verbose_name='thumbnail_url')

    class Meta:
        verbose_name = 'Contest Photo'

    @property
    def get_photo_src(self):
        return settings.MEDIA_URL + self.photo.image.name

    @property
    def get_thumbnail_url(self):
        # dont forget to add cache
        if len(self.thumbnail_url) == 0:
            file_name = self.get_photo_src
            last_dot = file_name.rfind('.')
            photo_name, photo_extension = file_name[:last_dot], file_name[last_dot:]
            self.thumbnail_url = photo_name + '_' + self.thumbnail_size.name + photo_extension

        return self.thumbnail_url

# serializers.py

class PhotoSerializer(serializers.ModelSerializer):
    thumbnail_height = serializers.ReadOnlyField(source='thumbnail_size.height')
    thumbnail_width = serializers.ReadOnlyField(source='thumbnail_size.width')
    src = serializers.ReadOnlyField(source='get_photo_src')
    thumbnail_url = serializers.ReadOnlyField(source='get_thumbnail_url')
    caption = serializers.ReadOnlyField(source='photo.caption')
    class Meta:
        model = Photo
        fields = ['src', 'thumbnail_url', 'thumbnail_height', 'thumbnail_width', 'caption']

class GallerySerializer(serializers.ModelSerializer):
    photos = PhotoSerializer(many=True)
    class Meta:
        model = Gallery
        fields = ['title', 'photos']

PhotoSerializer实际上返回了我期望它得到的对象的完整描述，但是当我将其嵌套在GallerySerializer中时，它仅显示thumbnail_url，这是模型本身包含的唯一字段。无论如何，我可以在GallerySerializer中包含PhotoSerializer的字段吗？（应该是照片列表）

谢谢。

Answer 1

使用here

所述的depth自变量

class GallerySerializer(serializers.ModelSerializer):
    photos = PhotoSerializer(many=True)
    class Meta:
        depth=1
        model = Gallery
        fields = ['title', 'photos']

Django restframwork嵌套嵌套序列化器的字段未出现在父序列化器中

1 个答案: