old_routes.rb

# OLD Routes.rb file - showing changes

#Rails.application.routes.draw do |map|
Rails.application.routes.draw do

  mount_at = Cheese::Engine.config.mount_at

  match mount_at => 'cheese/widgets#index'

  # map.resources :widgets, :only => [ :index, :show ],
  resources :widgets, :only => [ :index, :show ],
    :controller => "cheese/widgets",
    #:path_prefix => mount_at, (deprecated)
    #:name_prefix => "cheese_" (deprecated)
    :as => "cheese_"

end

routes.rb

# corrected routes file

Rails.application.routes.draw do

  mount_at = Cheese::Engine.config.mount_at

  match mount_at => 'cheese/widgets#index'

  scope mount_at do 

    resources :widgets, :only => [ :index, :show ],
      :controller => "cheese/widgets",
      :as => "cheese_widgets"

  end

end

# this produces:

# cheese /cheese(.:format)
# cheese_widgets GET /cheese/widgets(.:format)
# cheese_widget GET /cheese/widgets/:id(.:format)