python - 创建表时Django MySQL错误

Question

我正在使用 MySQL 数据库构建一个 django 应用程序。当我第一次运行“python manage.py migrate”时，一些表创建得很好，然后出现了一些错误。带出来的错误是:

django.db.utils.IntegrityError: (1215, 'Cannot add foreign key constraint')

当我运行这个 MySQL 命令时 -

SHOW ENGINE INNODB STATUS\G,

我明白了>>>

2015-02-17 14:33:17 7f10891cf700 Error in foreign key constraint of table movie_store/#sql-4f1_66:
 FOREIGN KEY (`group_id`) REFERENCES `auth_group` (`id`):
Cannot resolve table name close to:
 (`id`)

完整的回溯是:

Creating tables...
    Creating table users
    Creating table merchant
    Creating table celery_taskmeta
    Creating table celery_tasksetmeta
    Creating table djcelery_intervalschedule
    Creating table djcelery_crontabschedule
    Creating table djcelery_periodictasks
    Creating table djcelery_periodictask
    Creating table djcelery_workerstate
    Creating table djcelery_taskstate
    Creating table post_office_email
    Creating table post_office_log
    Creating table post_office_emailtemplate
    Creating table post_office_attachment
    Running deferred SQL...
Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 390, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 441, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 173, in handle
    created_models = self.sync_apps(connection, executor.loader.unmigrated_apps)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 309, in sync_apps
    cursor.execute(statement)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 80, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
  File "/usr/local/lib/python2.7/dist-packages/django/db/utils.py", line 95, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/utils.py", line 63, in execute
    return self.cursor.execute(sql)
  File "/usr/local/lib/python2.7/dist-packages/django/db/backends/mysql/base.py", line 124, in execute
    return self.cursor.execute(query, args)
  File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 174, in execute
    self.errorhandler(self, exc, value)
  File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
    raise errorclass, errorvalue
django.db.utils.IntegrityError: (1215, 'Cannot add foreign key constraint')

Answer 1

这会奏效

python manage.py migrate auth
python manage.py migrate

由于其他迁移在身份验证之前运行，所以这将确保“authtools”的迁移首先运行