mysql的database.yml

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: demo_development
  pool: 5
  username: X
  password: X
  host: localhost

test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: demo_test
  pool: 5
  username: X
  password: X
  host: localhost

production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: demo_production
  pool: 5
  username: X
  password: X
  host: localhost