Django Rest Framework-序列化后获取模型实例

Question

我做了一个序列化程序，并且Booking在验证POST数据之后，尝试从序列化程序中的booking字段创建一个实例。但是，由于Booking对象具有外键，因此出现错误：

ValueError：无法分配“ 4”：“ Booking.activity”必须是“ Activity”实例。

这是我的视图功能：

@api_view(['POST'])
def customer_charge(request):
    serializer = ChargeCustomerRequestSerializer(data=request.data)
    serializer.is_valid(raise_exception=True)

    # trying to create an instance using the ReturnDict from the serializer
    booking = Booking(**serializer.data['booking'])
    booking.save()

Serializers.py，其中BookingSerializer是ModelSerializer

class ChargeCustomerRequestSerializer(serializers.Serializer):
    booking = BookingSerializer()
    customer = serializers.CharField(max_length=255)

class BookingSerializer(serializers.ModelSerializer):
    class Meta:
        model = Booking
        fields = '__all__'
        # I wanted to view the instances with the nested information available
        # but this breaks the serializer validation if it's just given a foreign key
        # depth = 1

从嵌套序列化器创建模型实例的正确方法是什么？

Answer 1

serializer.validated_data 应该使用，而不是 serializer.data

Answer 2

model_obj = serializer.save()

model_obj保存模型实例，您可以相应地执行操作。或者您可以编写create()或update()在官方文档中提到的方法

反序列化对象：

https://www.django-rest-framework.org/api-guide/serializers/#deserializing-objects