Fedora手记（4）——为Django安装MySQL适配器

今天折腾的内容是：为Django搞上MySQL适配器。

安装过程无需多言，基本是缺啥装啥（那个setuptools啊～）。

最后的问题是当我啥都装上之后，用python manager sqlall myApp的时候，出现了如下的错误信息（不用看太多，最后一行才是重点）

Traceback (most recent call last):

File "manage.py", line 14, in <module>

execute_manager(settings)

File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 438, in execute_manager

utility.execute()

File "/usr/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute

self.fetch_command(subcommand).run_from_argv(self.argv)

File "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 191, in run_from_argv

self.execute(*args, **options.__dict__)

File "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 219, in execute

self.validate()

File "/usr/lib/python2.7/site-packages/django/core/management/base.py", line 249, in validate

num_errors = get_validation_errors(s, app)

File "/usr/lib/python2.7/site-packages/django/core/management/validation.py", line 103, in get_validation_errors

connection.validation.validate_field(e, opts, f)

File "/usr/lib/python2.7/site-packages/django/db/backends/mysql/validation.py", line 14, in validate_field

db_version = self.connection.get_server_version()

File "/usr/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 338, in get_server_version

self.cursor()

File "/usr/lib/python2.7/site-packages/django/db/backends/__init__.py", line 250, in cursor

cursor = self.make_debug_cursor(self._cursor())

File "/usr/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 322, in _cursor

self.connection = Database.connect(**kwargs)

File "/usr/lib/python2.7/site-packages/MySQLdb/__init__.py", line 81, in Connect

return Connection(*args, **kwargs)

File "/usr/lib/python2.7/site-packages/MySQLdb/connections.py", line 187, in __init__

super(Connection, self).__init__(*args, **kwargs2)

_mysql_exceptions.OperationalError: (2003, "Can't connect to MySQL server on '127.0.0.1 from' (111)")

居然连接不上localhost！

我把setting.py重新设置了一次，无效。

在一个美好的午睡之后，在n次google无果之后，我灵机一动：会不会是mysql还没有启动呢？

于是试了一下mysqladmin start

结果是：

mysqladmin: connect to server at 'localhost' failed

error: 'Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)'

Check that mysqld is running and that the socket: '/var/lib/mysql/mysql.sock' exists!

虽然不知道这是什么回事，但解决的方案已经呼之欲出了，把mysql重启一下：/etc/init.d/mysqld restart

所有问题都解决啦！

于是我