Eu segui cada passo para o legado funcionar no meu host local como discutido neste tutorial -http://www.slideshare.net/wleeper/devise-and-rails upto page 8 of 22 e eu estava esperando o mesmo formulário de login de usuário como mencionado na página 8, mas fora isso, eu estou recebendo este erro-

Se eu mantiver os comentários como está no arquivo routes.rb,

# match ': controller (/: action (/: id)) (.: format)'

então esta mensagem sinaliza -

E quando eu descomente esta linha, mostra este erro-

Tenho muito menos idéia sobre rails, como eu sou do background do PHP, mas ainda estou tentando alguns testes práticos antes da teoria, então deixe-me saber exatamente o que estou fazendo errado.

Meu arquivo routes.rb -

Prjmgt::Application.routes.draw do
  devise_for :users

  # The priority is based upon order of creation:
  # first created -> highest priority.

  # Sample of regular route:
  #   match 'products/:id' => 'catalog#view'
  # Keep in mind you can assign values other than :controller and :action

  # Sample of named route:
  #   match 'products/:id/purchase' => 'catalog#purchase', :as => :purchase
  # This route can be invoked with purchase_url(:id => product.id)

  # Sample resource route (maps HTTP verbs to controller actions automatically):
  #   resources :products

  # Sample resource route with options:
  #   resources :products do
  #     member do
  #       get 'short'
  #       post 'toggle'
  #     end
  #
  #     collection do
  #       get 'sold'
  #     end
  #   end

  # Sample resource route with sub-resources:
  #   resources :products do
  #     resources :comments, :sales
  #     resource :seller
  #   end

  # Sample resource route with more complex sub-resources
  #   resources :products do
  #     resources :comments
  #     resources :sales do
  #       get 'recent', :on => :collection
  #     end
  #   end

  # Sample resource route within a namespace:
  #   namespace :admin do
  #     # Directs /admin/products/* to Admin::ProductsController
  #     # (app/controllers/admin/products_controller.rb)
  #     resources :products
  #   end

  # You can have the root of your site routed with "root"
  # just remember to delete public/index.html.
  # root :to => 'welcome#index'
    root :to => 'home#index'

  # See how all your routes lay out with "rake routes"

  # This is a legacy wild controller route that's not recommended for RESTful applications.
  # Note: This route will make all actions in every controller accessible via GET requests.
   match ':controller(/:action(/:id))(.:format)'
end

Basta executar umrake routes comando e encontrar isso -