Python Django-一对一序列化程序创建函数
我将默认用户模型扩展为ExtendeDeduser:Python Django-一对一序列化程序创建函数,python,django,serialization,django-models,django-rest-framework,Python,Django,Serialization,Django Models,Django Rest Framework,我将默认用户模型扩展为ExtendeDeduser: from django.db import models from django.contrib.auth.models import User class ExtendedUser(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) shirt_size = models.CharField(max_length=2) 用户
from django.db import models
from django.contrib.auth.models import User
class ExtendedUser(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
shirt_size = models.CharField(max_length=2)
用户序列化程序:
from django.contrib.auth.models import User
from rest_framework import serializers
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('url', 'username', 'email', 'groups', 'is_staff')
from api.resources.users.models.extended_user import ExtendedUser
from rest_framework import serializers
from django.contrib.auth.models import User
from api.resources.users.serializers.user import UserSerializer
class ExtendedUserSerializer(serializers.HyperlinkedModelSerializer):
user = UserSerializer(read_only=False)
class Meta:
model = ExtendedUser
fields = ('url', 'shirt_size', 'user')
def create(self, validated_data):
user_data = validated_data.pop('user')
user = User.objects.create(**user_data)
return ExtendedUser.objects.create(user=user, **validated_data)
扩展程序序列化程序:
from django.contrib.auth.models import User
from rest_framework import serializers
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('url', 'username', 'email', 'groups', 'is_staff')
from api.resources.users.models.extended_user import ExtendedUser
from rest_framework import serializers
from django.contrib.auth.models import User
from api.resources.users.serializers.user import UserSerializer
class ExtendedUserSerializer(serializers.HyperlinkedModelSerializer):
user = UserSerializer(read_only=False)
class Meta:
model = ExtendedUser
fields = ('url', 'shirt_size', 'user')
def create(self, validated_data):
user_data = validated_data.pop('user')
user = User.objects.create(**user_data)
return ExtendedUser.objects.create(user=user, **validated_data)
主要的结果应该是,在提交新的ExtendeDeduser时,它也将创建一个一对一实现的用户
但我得到了这个错误:
用户:在此之前,myusername需要为字段“User”设置一个值
可以使用多对多关系
回溯:
Environment:
Request Method: POST
Request URL: http://localhost:8000/users/
Django Version: 1.10.4
Python Version: 2.7.12
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'api']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner
39. response = get_response(request)
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\viewsets.py" in view
83. return self.dispatch(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
477. response = self.handle_exception(exc)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in handle_exception
437. self.raise_uncaught_exception(exc)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
474. response = handler(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\mixins.py" in create
21. self.perform_create(serializer)
File "C:\Python27\lib\site-packages\rest_framework\mixins.py" in perform_create
26. serializer.save()
File "C:\Python27\lib\site-packages\rest_framework\serializers.py" in save
214. self.instance = self.create(validated_data)
File "C:/Users/ozbar/PycharmProjects/usnccm/usnccm-api\api\resources\users\serializers\extended_user.py" in create
15. user = User.objects.create(**user_data)
File "C:\Python27\lib\site-packages\django\db\models\manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\query.py" in create
397. obj = self.model(**kwargs)
File "C:\Python27\lib\site-packages\django\contrib\auth\base_user.py" in __init__
68. super(AbstractBaseUser, self).__init__(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\base.py" in __init__
550. setattr(self, prop, kwargs[prop])
File "C:\Python27\lib\site-packages\django\db\models\fields\related_descriptors.py" in __set__
499. manager = self.__get__(instance)
File "C:\Python27\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__
476. return self.related_manager_cls(instance)
File "C:\Python27\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__
783. (instance, self.source_field_name))
Exception Type: ValueError at /users/
Exception Value: "<User: oz>" needs to have a value for field "user" before this many-to-many relationship can be used.
对于初学者来说,问题与django rest框架或python版本无关 django==1.10似乎是一个问题,因为我只是尝试:
User.objects.create(User=“hello”,email=“333。22@eewofw.com“,groups=[],is_staff=False)
在django的shell中
,收到了完全相同的错误。但是,如果我们尝试更新版本的django,问题不会持续
我注意到,使用此命令安装django时:
pip安装django
它将安装django==1.10
,而不是最新版本。如果错误安装了此旧版本,我建议卸载django,然后安装最新版本:
pip卸载django
pip安装django==1.9.12
使用
django==1.9.12
时,您需要从UserSerializer
中完全删除groups
,并且在执行POST时不提供它。您可以发布完整的回溯吗?是的,我刚刚添加了dhm,这个错误非常奇怪,不应该在一对一的关系中出现。您确定这是完整的ExtendeDeduser
模型并且所有迁移都已运行吗?您能在create
方法接收时打印validated\u数据
并将其发布到此处吗?我已经完成了所有迁移。。使用已验证的_数据值编辑我正在使用django rest web视图