django 在序列化程序中从同一模型生成两个字段

vsdwdz23 于 2022-12-01 发布在 Go

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我在另一个序列化器中使用嵌套序列化器，并且我有两个模型Object和ObjectMedia，请参见以下代码：

class ObjectMediaSerializer(serializers.ModelSerializer):
    media_address = serializers.SerializerMethodField()    
    class Meta:
        model = ObjectMedia
        fields = ["media_address", "type"]

class ObjectAddEditSerializer(serializers.ModelSerializer):
   
    slug = serializers.SlugField(read_only=True)
    object_medias = ObjectMediaSerializer(many=True, required=True)

    class Meta:
        model = Program
        fields = [
            "slug",
            "object_medias",
        ]

我想在两个字段中添加对象媒体（由其类型分隔），如下所示，但我不知道如何实现：

{
  "slug":"my_slug",
  "object_media_type1": [
    {
      "media_address ": "somewhere",
       "type":TYPE1
    }
  ],
"object_media_type2": [
    {
      "media_address ": "somewhere",
       "type":TYPE2
    },
      {
      "media_address ": "somewhere\else",
       "type":TYPE2
    }]
}

django

来源：https://stackoverflow.com/questions/72196265/make-two-fields-in-serializer-from-a-same-model

1条答案

按热度按时间

gab6jxml1#

您可以使用SerializerMethodField：

class ObjectAddEditSerializer(serializers.ModelSerializer):
   
    slug = serializers.SlugField(read_only=True)
    object_media_type1 = serializers.SerializerMethodField()
    object_media_type2 = serializers.SerializerMethodField()

    def get_object_media_type1(self, instance):
        return ObjectMediaSerializer(instance.object_medias.filter(type="type1"), many=True).data

    def get_object_media_type2(self, instance):
        return ObjectMediaSerializer(instance.object_medias.filter(type="type2"), many=True).data

    class Meta:
        model = Program
        fields = [
            "slug",
            "object_media_type1",
            "object_media_type2",
        ]

请注意，它们是只读的。此处为官方文档。

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django 在序列化程序中从同一模型生成两个字段

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