无法连接到mysql的Rails应用程序无法通过套接字/var/运行/mysqld/mysql连接到本地mysql服务器。袜子的(2)(Mysql2:错误)

I'm currently stuck on what is (I hope a newby) problem with a rails project (this is my first rails project and so I apologise if I miss anything crucial). I've been at this for a couple of hours and can't seem to find any solutions. I have tried the solutions to the following threads with no avail.I'm currently stuck on what is (I hope a newby)