DjangoRestFramework 序列化程序的条件字段要求答案

【问题标题】：Conditional field requirement with DjangoRestFramework serializerDjangoRestFramework 序列化程序的条件字段要求
【发布时间】：2016-03-01 11:19:28
【问题描述】：

我在 Django Rest Framework 2 中有这些嵌套的序列化程序：

class BookingSerializer(Serializer):
    reservation_history_id = serializers.IntegerField()
    credit_card = 'api.v1.serializer.AddCreditCardSerializer()'
    save_credit_card = serializers.BooleanField()
    promo_code = serializers.BooleanField(required=False)

    # validation stuff here ...

class AddCreditCardSerializer(ModelSerializer):
    """ Credit card model serializer """
    expiration_date = serializers.CharField()
    card_number = serializers.CharField()
    security_code = serializers.IntegerField()

    # validation stuff here ...

在我的 ApiView BookingApiView 中，我正在调用 BookingSerializer。根据返回 True 或 False 的后端方法，我想强制或不强制使用信用卡字段。我怎样才能做到这一点？谢谢。

【问题讨论】：

标签： python django serialization django-rest-framework

【解决方案1】：

您可以修改BookingSerializer 的__init__ 方法中的字段。初始化后可以在self.fields中访问这些字段

class BookingSerializer(Serializer):
    reservation_history_id = serializers.IntegerField()
    credit_card = 'api.v1.serializer.AddCreditCardSerializer()'
    save_credit_card = serializers.BooleanField()
    promo_code = serializers.BooleanField(required=False)

    def __init__(self, *args, **kwargs):
        # initialize fields
        super(BookingSerializer, self).__init__(*args, **kwargs)
        # now modify the creditcard field
        self.fields['credit_card'].required = yourBackendMethod()

【讨论】：