在 databases.yml編寫配置如下：# MySQL. Versions 4.1 and 5.0 are recommended. # # Install the MySQL driver: # gem install mysql2 # # And be sure to use new-style password hashing: # http://dev.mysql.com/doc/refman/5.0/en/old-client.html development: adapter: mysql2 encoding: utf8 reconnect: false database: test-mysql2_development pool: 5 username: root password: socket: /tmp/mysql.sock # Warning: The database defined as "test" will be erased and # re-generated from your development database when you run "rake". # Do not set this db to the same as development or production. test: adapter: mysql2 encoding: utf8 reconnect: false database: test-mysql2_test pool: 5 username: root password: socket: /tmp/mysql.sock production: adapter: mysql2 encoding: utf8 reconnect: false database: test-mysql2_production pool: 5 username: root password: socket: /tmp/mysql.sock