Django休息框架一對一關係更新串行器

我是Django Rest Frame工作的初學者。我長期以來遇到問題，我試圖通過很多論壇尋找解決方案，但不幸的是我沒有成功。希望大家幫我Django休息框架一對一關係更新串行器

models.py

from __future__ import unicode_literals 
from django.contrib.auth.models import User 

from django.db import models 

class Account(models.Model): 
    my_user=models.OneToOneField(User,on_delete=models.CASCADE) 
    statut=models.CharField(max_length=80) 
    date=models.DateField(auto_now=True,auto_now_add=False) 

    def __unicode__(self): 

     return self.my_user.first_name

現在我想更新帳戶serilizer。串行器的.py

class AccountUpdateSerializer(serializers.ModelSerializer): 


    username=serializers.CharField(source ='my_user.username') 

    class Meta: 

     model= Account 
     fields=['id','username','statut','date'] 
     def update(self, instance, validated_data): 
      print(instance) 
      instance.statut = validated_data.get('statut', instance.statut) 
      instance.my_user.username=validated_data['username'] 
      return instance

追溯：環境：

Request Method: PUT 
Request URL: http://127.0.0.1:9000/api/account/edit/1/ 

Django Version: 1.9 
Python Version: 2.7.6 
Installed Applications: 
['django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'rest_framework', 
'project', 
'sponsors', 
'contacts', 
'medias', 
'conferencier', 
'competition', 
'poste', 
'account'] 
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.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware'] 



Traceback: 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
    149.      response = self.process_exception_by_middleware(e, request) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
    147.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view 
    58.   return view_func(*args, **kwargs) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/views/generic/base.py" in view 
    68.    return self.dispatch(request, *args, **kwargs) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/views.py" in dispatch 
    474.    response = self.handle_exception(exc) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/views.py" in handle_exception 
    434.    self.raise_uncaught_exception(exc) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/views.py" in dispatch 
    471.    response = handler(request, *args, **kwargs) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/generics.py" in put 
    256.   return self.update(request, *args, **kwargs) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/mixins.py" in update 
    70.   self.perform_update(serializer) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/mixins.py" in perform_update 
    74.   serializer.save() 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/serializers.py" in save 
    187.    self.instance = self.update(self.instance, validated_data) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/serializers.py" in update 
    907.    setattr(instance, attr, value) 

File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/db/models/fields/related_descriptors.py" in __set__ 
    207.      self.field.remote_field.model._meta.object_name, 

Exception Type: ValueError at /api/account/edit/1/ 
Exception Value: Cannot assign "{u'username': u'kais'}": "Account.my_user" must be a "User" instance.

來源

2016-09-21 asus1902

你的模型具有my_user和你的串行有my_username。哪一個？ – e4c5

我的意思是my_user.username不是my_username我改正了它，但同樣的問題 – asus1902

編輯你的問題併發布確切的代碼，以便人們不必猜測 – e4c5

你update方法不叫，因爲它是元級串行（AccountUpdateSerializer.Meta）的方法，而不是串行類AccountUpdateSerializer本身。

下面是它應該如何看：

class AccountUpdateSerializer(serializers.ModelSerializer): 

    username=serializers.CharField(source ='my_user.username') 

    class Meta: 

     model= Account 
     fields=['id','username','statut','date'] 

    def update(self, instance, validated_data): 
     print(instance) 
     instance.statut = validated_data.get('statut', instance.statut) 
     instance.my_user.username = validated_data['username'] 
     return instance

（還是你只是發佈您的代碼不正確？）

來源

2016-09-21 08:45:29

非常感謝它現在有效 – asus1902

Django休息框架一對一關係更新串行器

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