python - 如何提供正确的请求正文来序列化 Django 通用外键？

Question

我有一个名为“电话”的通用模型:

(my_project/apps/phones/models.py)

class Phone(Model):
    owner_name = CharField(max_length=50)
    number = CharField(max_length=20)

    content_type = ForeignKey(ContentType, on_delete=CASCADE)
    object_id = PositiveIntegerField()
    phone_object = GenericForeignKey('content_type', 'object_id')

我还有一个名为“Client”的模型:

(my_project/apps/clients/models.py)

class Client(Model):
    employee = ForeignKey(Employee, on_delete=CASCADE)
    title = CharField(max_length=50)

    phones = GenericRelation(Phone)

我还有一个用于“客户端”的序列化器:

(my_project/apps/clients/serializers.py)

class ClientSerializer(ModelSerializer):
    id = IntegerField(read_only=True)
    employee_id = PrimaryKeyRelatedField(queryset=Employee.objects.all(), source='employee', required=True)
    title = CharField(required=True)

我遵循了 drf-documenation ( http://www.django-rest-framework.org/api-guide/relations/#generic-relationships )，据我了解，我需要将自定义类放在同一个文件中，所以这是我的 client/serializers.py 的样子:

(my_project/apps/clients/serializers.py)

class ClientSerializer(ModelSerializer):
    id = IntegerField(read_only=True)
    employee_id = PrimaryKeyRelatedField(queryset=Employee.objects.all(), source='employee', required=True)
    title = CharField(required=True)

class PhoneObjectRelatedField(RelatedField):
    def to_representation(self, value):
        if isinstance(value, Client):
            serializer = ClientSerializer(value)
        else:
            raise Exception('Unexpected type of phone_object')
        return serializer.data

对于我使用 PostMan 的请求，因此这是我使用电话号码创建新客户的请求:

但是什么也没做，新客户可以成功创建，但他们只是不包含任何电话号码，请帮忙!

Answer 1

您可以将相关字段添加到序列化器字段中

class ClientSerializer(ModelSerializer):
    id = IntegerField(read_only=True)
    employee_id = PrimaryKeyRelatedField(queryset=Employee.objects.all(), source='employee', required=True)
    title = CharField(required=True)
    phone = PhoneObjectRelatedField()

由@Madi7更新

电话 = PhoneObjectRelatedField(queryset=Phone.objects.all())