MacPortsでMysqlをインストールしてRailsで使う

sudo port install mysql5 +server
sudo -u mysql mysql_install_db5
/opt/local/lib/mysql5/bin/mysqladmin -u root password 'hogehoge'
sudo launchctl load -w /Library/LaunchDaemons/org.macports.mysql5.plist
sudo gem install mysql --with-mysql-config=/opt/local/lib/mysql5/bin/mysql_config