rails 连接mysql

首先安装mysql

1..sudo apt-get install mysql-server

安装mysql2 需要的环境
2.sudo apt-get install libmysqlclient-dev
安装 mysql2的gem包
gem install mysql2
然后配置database.yml文件
production:
  adapter: mysql2
  host: 127.0.0.1
  database: mm_production
  pool: 5
  username: root
  password: root