namespace, scope and module

controllers

• articles

  # /admin/arcitles_controller.rb
  class Admin::ArticlesController < ApplicationController
    # ...
  end
  

• news

  # /news_controller.rb
  class NewsController < ApplicationController
    # ...
  end
  

routes

Using namespace for routing, makes namespace as the url_prefix, affects the url_helper and invoke actions of controllers which are under the same namespace folder.

# localhost:3000/admin/articles

# routes.rb
namespace :admin do
    resources :articles
end

We can use module to indicate where the controller lives for omitting the controller's namespace.

# localhost:3000/articles

# routes.rb
scope module: 'admin' do
    resources :articles
end

By using scope and module, custom urls no matter where the controller is under.

# localhost:3000/popular/articles

# routes.rb
scope 'popular', module: 'admin' do
    resoLets :articles
end

Make urls of controllers not ur the same folder to look like being the same group(\/admin), scope.

# localhost:3000/admin/news

# routes.rb
scope 'admin' do
    resources :news
end

Reference

• 2.6 Controller Namespaces and Routing
• Scoping Rails Routes