python - 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，我想强制要求或不要求信用卡字段。 我怎样才能做到这一点？谢谢。

Answer 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()