使用DjangoRestFramework序列化程序的条件字段要求

Question

我在Django Rest Framework 2中有这些嵌套的序列化器:

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中BookingApiView,我正在打电话给BookingSerializer.根据返回True或False的后端方法,我想强制或不强制信用卡字段.我怎样才能做到这一点？谢谢.

Answer 1

您可以修改__init__方法中的字段BookingSerializer.初始化后,可以访问字段self.fields

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()