wiki:SockFile
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Problem

I want to use turbo gears, but my machine is setup with mysql not bound to a network socket and I get the following errors when I try to connect: _mysql_exceptions.OperationalError??: (2002, "Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)");

Solution

There is a practice of not binding MySQL to an ip address and port following the principle that "if you're not connected, you are protected." In this situation, the server has a socket file. By default TurboGears (or SQLObject and the python MySQL driver/client to be more exact) will look for the socket file in /tmp/mysql.sock. Many installations seem to use /var/lib/mysql/mysql.sock. Therefore, to get TurboGears to work, you'll need to specify the unix_socket (if on unix) param in the dburi. You can find out where your mysql socket is by looking at the file my.cnf that usually resides in /etc/my.cnf or /etc/mysql/my.cnf.

Format: sqlobject.dburi="mysql://username:password@/databasename?unix_socket=path-to-mysql.sock"

Example: I have my socket file in /var/lib/mysql/mysql.sock and I want my user foo with password bar to connect to my db test1. sqlobject.dburi="mysql:/foo:bar@/test1?unix_socket=/var/lib/mysql/mysql.sock"