mysql - IntegrityError at/accounts/signup/in django

Question

我刚刚在 ubuntu 14.04 服务器上使用 apache 部署了我的 django 站点。正在访问该站点。但是当我以用户身份注册到其中时，它会创建用户但无法创建与我的用户处于一对一关系的用户配置文件。另外，我正在使用自定义用户模型。它在注册时抛出的错误是:

Cannot add or update a child row: a foreign key constraint fails (`ilog_prod_db`.`myuserprofile_myuserprofile`, CONSTRAINT `myuserprofile_myuserp_myuser_id_6ad6f704425ed359_fk_auth_user_id` FOREIGN KEY (`myuser_id`) REFERENCES `auth_user` (`id`))

重点是，在我的开发机器 (windows7) 上，该网站使用相同的代码运行得非常好。此外，数据库的设置完全相同，即在两个地方我都使用 InnoDB 作为数据库的数据库引擎。

可能是什么问题。任何指针将不胜感激。谢谢。

回溯:

Environment:


Request Method: POST
Request URL: http://www.industrylogger.com/accounts/signup/

Django Version: 1.7.2
Python Version: 3.4.0
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'enterprise',
 'accounts',
 'nodes',
 'message',
 'myuserprofile',
 'enterprise_profile',
 'activities',
 'search',
 'imagekit')
Installed Middleware:
('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/sp/webapps/myenv/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  111.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/sp/webapps/ilog_dev/accounts/views.py" in signup
  24.                                          password=password,)
File "/home/sp/webapps/ilog_dev/accounts/models.py" in create_myuser
  93.         user.save(using=self._db)
File "/home/sp/webapps/ilog_dev/accounts/models.py" in save
  152.             super(MyUser, self).save(*args, **kwargs)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/base.py" in save
  589.                        force_update=force_update, update_fields=update_fields)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/base.py" in save_base
  626.                                    update_fields=update_fields, raw=raw, using=using)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/dispatch/dispatcher.py" in send
  198.             response = receiver(signal=self, sender=sender, **named)
File "/home/sp/webapps/ilog_dev/myuserprofile/models.py" in create_user_profile
  121.         MyUserProfile.objects.create(myuser=instance)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/manager.py" in manager_method
  92.                 return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/query.py" in create
  372.         obj.save(force_insert=True, using=self.db)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/base.py" in save
  589.                        force_update=force_update, update_fields=update_fields)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/base.py" in save_base
  617.             updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/base.py" in _save_table
  698.             result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/base.py" in _do_insert
  731.                                using=using, raw=raw)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/manager.py" in manager_method
  92.                 return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/query.py" in _insert
  921.         return query.get_compiler(using=using).execute_sql(return_id)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in execute_sql
  920.                 cursor.execute(sql, params)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/backends/utils.py" in execute
  81.             return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/db/backends/utils.py" in execute
  65.                 return self.cursor.execute(sql, params)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/mysql/connector/django/base.py" in execute
  135.         return self._execute_wrapper(self.cursor.execute, query, args)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/mysql/connector/django/base.py" in _execute_wrapper
  121.                         utils.IntegrityError(err.msg), sys.exc_info()[2])
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/django/utils/six.py" in reraise
  658.             raise value.with_traceback(tb)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/mysql/connector/django/base.py" in _execute_wrapper
  115.             return method(query, args)
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/mysql/connector/cursor.py" in execute
  507.                 self._handle_result(self._connection.cmd_query(stmt))
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/mysql/connector/connection.py" in cmd_query
  722.         result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query))
File "/home/sp/webapps/myenv/lib/python3.4/site-packages/mysql/connector/connection.py" in _handle_result
  640.             raise errors.get_exception(packet)

Exception Type: IntegrityError at /accounts/signup/
Exception Value: Cannot add or update a child row: a foreign key constraint fails (`ilog_prod_db`.`myuserprofile_myuserprofile`, CONSTRAINT `myuserprofile_myuserp_myuser_id_6ad6f704425ed359_fk_auth_user_id` FOREIGN KEY (`myuser_id`) REFERENCES `auth_user` (`id`))

Answer 1

从问题的评论来看，您的 Django 模型和数据库模式似乎不同步。如果可以，只需删除数据库并重新创建。如果您有重要数据...

首先备份您的生产数据库

根据您使用的 django 版本，数据库同步的行为会有所不同。

Django <= 1.6

python manage.py syncdb 命令可用于将任何缺失的模式信息添加到数据库中。如果您的问题源于您向模型添加了新表或字段/约束已被删除，这可能会修复架构。

它不会删除任何旧字段或迁移任何数据，因此您之后很可能需要进行一些手动编辑。

Django >= 1.7

1.7 引入了新的 python manage.py migrate ( Docs ) 命令，它更加智能。随着模型的更改，将创建迁移。当旧数据库需要与新模型内联时，迁移将应用于数据库。

这更加灵活，并允许根据需要升级/降级数据库版本。

缺点是您需要随时进行迁移(或之后手动创建)。有关详细信息，请参阅文档

在任何一种情况下，如果模型太不同步或者您没有适当的迁移，您将需要做一些手动工作以使数据进入 django 所需的状态。