Laravel v4.2のmigrationで"SQLSTATE[HY000] [2002] No such file or directory "というエラーが出たので．

# エラー.
$ php artisan migrate
> SQLSTATE[HY000] [2002] No such file or directory

$ php -i | grep 'pdo'
> 663:pdo_mysql.default_socket => /tmp/mysql.sock => /tmp/mysql.sock

# パスを修正する.(~/.my.cnfと揃える)
$ vi /usr/local/etc/php/5.6/php.ini

# restart.
$ sudo apachectl restart

# 再確認
$ php -i | grep 'pdo'
> 663:pdo_mysql.default_socket => /usr/local/var/lib/mysql/mysql.sock => /usr/local/var/lib/mysql/mysql.sock

# 再実行.
$ php artisan migrate
> Migration table created successfully.
> Migrated: 2015_07_22_210009_create_todos_table