Displaying host and database names in Rails

On Rails 3, this is most easily accessed via Rails::Application.config, like so:

    YourApplicationClassName::Application.config.database_configuration[::Rails.env]

If you try to call it directly on Rails instead of YourApplicationClassName, rails will give you a deperecation warning. If you don't know what your application constant is, try Rails.application.class.name in a Rails console for your app.