rails--rails/railties/configs/database.yml

development:
  adapter: mysql
  database: rails_development
  host: localhost
  username: root
  password: 

test:
  adapter: mysql
  database: rails_test
  host: localhost
  username: root
  password:

production:
  adapter: mysql
  database: rails_production
  host: localhost
  username: root
  password: