我正在尝试使用Ubuntu 10.04服务器,sphinx,myql2版本0.2.7和percona服务器5.5(Myslql 5.5)运行Rails两个应用程序.irb中的mysql2工作正常,我可以连接到db.这个rails 2应用程序正在另一个带有MySql 5.1的Centos服务器上运行.当我跑:

script/server -e production 

我明白了:

mysql2.so:libmysqlclient_r.so.15:无法打开共享对象文件:没有这样的文件或目录

这是我的libs:

# ls -l /usr/lib |grep sql
-rw-r--r--  1 root root 10581008 2011-11-18 16:51 libmysqlclient.a
lrwxrwxrwx  1 root root       16 2011-12-10 05:48 libmysqlclient_r.a -> libmysqlclient.a
lrwxrwxrwx  1 root root       20 2011-12-10 05:48 libmysqlclient.so -> libmysqlclient.so.16
lrwxrwxrwx  1 root root       29 2011-12-10 06:01 libmysqlclient.so.15 -> /usr/lib/libmysqlclient.so.16
-rw-r--r--  1 root root     7332 2011-11-18 16:44 libmysqlservices.a
-rw-r--r--  1 root root   562520 2010-02-08 06:59 libsqlite3.a
-rw-r--r--  1 root root      973 2010-02-08 06:59 libsqlite3.la
lrwxrwxrwx …

用Homebrew安装MySQL和Python

我在OS X 10.10.5 Yosemite上用Homebrew安装了MySQL和Python.我的Python 2.7 python -> ../Cellar/python/2.7.9/bin/python带有一个符号链接/usr/local/bin/python.

在/usr/local/bin有一个符号链接:
mysql -> ../Cellar/mysql/5.7.9/bin/mysql

错误

在Python shell中:

>>> import MySQLdb
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/site-packages/MySQLdb/__init__.py", line 19, in <module>
    import _mysql
ImportError: dlopen(/usr/local/lib/python2.7/site-packages/_mysql.so, 2): Library not loaded: /usr/local/lib/libmysqlclient.18.dylib
  Referenced from: /usr/local/lib/python2.7/site-packages/_mysql.so
  Reason: image not found

所以我尝试过:
$ sudo unlink /usr/local/lib/libmysqlclient.18.dylib

其次是:
DYLD_LIBRARY_PATH=/usr/local/mysql/lib/:$DYLD_LIBRARY_PATH

然后(对理性的绝望):
$ export DYLD_LIBRARY_PATH=/usr/local/Cellar/mysql/5.7.9/lib

但在这两种情况下import MySQLdb仍然试图导入libmysqlclient.18.dylib.

然后我尝试了:
$ pip install -U MySQL-python …