Question

我的本地Django正忙着运行在我们的服务器上运行的manage.py syncdb脚本。

这是我在运行python manage.py syncdb，

时看到的错误消息

操作错误：（1193，“未知系统变量'TRANSACTION'”）

它看起来像MySQL问题，仅供参考我在虚拟环境中使用Django 1.5.1安装MySQL-python 1.2.4并运行MySQL 5.6.10版。

这是我当前的虚拟环境pip list，

Django (1.5.1)
MySQL-python (1.2.4)
pymongo (2.5.2)
python-cjson (1.0.5)
wsgiref (0.1.2)

我对Django不是很精通，谷歌搜索没有任何结果，有人能告诉我这里会发生什么吗？

以下命令的完全引用

Traceback (most recent call last):
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/django/core/management/base.py", line 222, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/django/core/management/base.py", line 255, in execute
    output = self.handle(*args, **options)
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/django/core/management/base.py", line 385, in handle
    return self.handle_noargs(**options)
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 56, in handle_noargs
    cursor = connection.cursor()
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/django/db/backends/__init__.py", line 326, in cursor
    cursor = util.CursorWrapper(self._cursor(), self)
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 405, in _cursor
    self.connection = Database.connect(**kwargs)
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/MySQLdb/__init__.py", line 81, in Connect
    return Connection(*args, **kwargs)
  File "/Users/jamesmcmahon/src/business-intelligence/mongo2mysql/venv/lib/python2.7/site-packages/MySQLdb/connections.py", line 187, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
OperationalError: (1193, "Unknown system variable 'TRANSACTION'")

修改
我在settings.py

中找到了导致问题的确切行

DATABASES = {
     'default': {
        'NAME': 'test',
        'ENGINE': 'django.db.backends.mysql',
        'USER': 'redacted',
        'PASSWORD': 'redacted',
        'HOST': 'localhost'
        'OPTIONS': { "init_command": "SET storage_engine=INNODB, SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED" }
    },
}

选项行在提交时修复了问题。我唯一能想到的是服务器正在运行MySQL 5.5，我在本地运行5.6。

我仍然想知道到底发生了什么。

Answer 1

使用

DATABASES = {

'default': {
    'NAME': 'test',
    'ENGINE': 'django.db.backends.mysql',
    'USER': 'redacted',
    'PASSWORD': 'redacted',
    'HOST': 'localhost'
    'OPTIONS': { "init_command": "SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED"}

}，

}

即没有“storage_engine = INNODB”。最新版本的MySql引擎默认为INNODB。

Answer 2

运行sudo mysqld --version
在mysql版本5.7.11中，存储引擎系统变量为：default-storege-engine因此，您的OPTIONS设置应为： { 'OPTIONS': { "init_command": "SET default_storage_engine=INNODB"} }
要在系统上查找存储引擎变量的名称，请运行此命令sudo mysqld --verbose --help | grep storage

Django在syncdb上的未知系统变量'TRANSACTION'

2 个答案: