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

development:
  adapter: mysql
  database: rails_development
  host: localhost
  username: root
  password:
  # With the MySQL adapter on localhost, it defaults to /tmp/mysql.sock
  # socket: /var/run/mysqld/mysqld.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: mysql
  database: rails_test
  host: localhost
  username: root
  password:

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