python - django Rest Framework - 如何为序列化器添加静态字段值

Question

我需要向序列化器添加一个静态字段。无论传递的对象如何，它都应该始终返回相同的值。目前我是这样实现的:

class QuestionSerializer(serializers.ModelSerializer):
    type = serializers.SerializerMethodField()

    @staticmethod
    def get_type(obj):
        return 'question'

    class Meta:
        model = Question
        fields = ('type',)

但是有没有更简单的方法来做到这一点，而不需要 SerializerMethodField？

Answer 1

使用 ReadOnlyField 对我有用:

class QuestionSerializer(serializers.ModelSerializer):
    type = serializers.ReadOnlyField(default='question')

    class Meta:
        model = Question
        fields = ('type',)

https://www.django-rest-framework.org/api-guide/fields/#readonlyfield