Modular structure on rails. switcher question

Question

Ruby on Rails

How a two (or more) modular structure of an application is organized on rails - backend and frontend, for example, using some common models and settings, but nevertheless differing in their controllers and views. So that generation through scaffold continues to correctly generate models.

Example on Zend Framework

Answer 1

app
|__controllers
|____foo
|______one_controller.rb
|____bar
|______two_controller.rb
|____baz
|______three_controller.rb
class Foo::OneController
class Bar::TwoController
class Baz::ThreeController

Answer 2

app/
controllers/
welcome_controller.rb
blog/
welcome_controller.rb
news
welcome_controller.rb
models/
etc…