Django 序列化程序继承和扩展字段

Question

我有这两个序列化程序:

class BasicSerializer(serializers.ModelSerializer):
    class Meta:
         model = MyModel
         fields = ('lengthy', 'touple', 'of', \
              'fields', 'like', '10', 'of', 'them')

class AdvandedSerializer(BasicSerializer):
    additional_field = serializers.SerializerMethodField()
    def get_additional_field(self, obj):
        return('not important')
    class Meta:
         model = MyModel
         fields = ('lengthy', 'touple', 'of', \
              'fields', 'like', '10', 'of', 'them', 'additional_field')       

这显然是相当丑陋的代码。我想获取并扩展 fields来自 super() ，但是我不知道如何。

Answer 1

你可以做:

class BasicSerializer(serializers.ModelSerializer):
    class Meta:
         model = MyModel
         fields = ('lengthy', 'touple', 'of', 'fields', 'like', '10', 'of', 'them')

class AdvandedSerializer(BasicSerializer):
    additional_field = serializers.SerializerMethodField()

    def get_additional_field(self, obj):
        return('not important')

    class Meta(BasicSerializer.Meta):
        fields = BasicSerializer.Meta.fields + ('additional_field',)