I followed this article at hivelogic.com which required compiling mysql from source. It mostly worked with a few hitches which I’d like to share.

After following the article and attempting to run my rails app the first problem I hit was…

uninitialized constant MysqlCompat::MysqlRes

this problem seemed to be that you need to specify the atchitecture as 64-bit when installing the mysql gem. So run the below command intead when install the mysql gem…

sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-
config=/usr/local/mysql/bin/mysql_config

Or if you already installed the gem just re-install with this command. The next problem was the following…

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

I’d move a project from ubuntu onto the mac I couldn’t find the mysql socket to use as it was specifying the wrong location. On the mac the file can be found at

/tmp/mysql.sock

So you’ll need to modify your database.yml file accordingly to point to this location

Hope this helps.

Looks like you forget to configure the test database parameters in the configuration/database.yml file.