rails 数据库配置

驱动配置：Gemfile:gem 'mysql2', '0.2.6' 或者gem install mysql2 --with-mysql-dir=/usr/local/mysql --with-mysql-config=/usr/local/mysql/bin/mysql_configwindows 两者均可，linux推荐第二种，给驱动指定部分参数（根据你mysql数据库的安装）  

database.yml配置development:   adapter: mysql2      encoding: utf8      reconnect: false     database: xxx   pool: 5      username: xxx   password: xxx   host: xxx.xxx.x.xxx