Attempted solution to http://stackoverflow.com/questions/5984850/how-to-achieve-a-separated-admin-namespaced-or-scoped-with-two-devise-models-u

routes.rb

  match 'admin', :controller => 'admin'
  
  namespace :admin do
    # to be updated later... 
  end

  devise_for :users
  #devise_for :admins, :path => "admin"  # this works but uses the default
                                         # Devise::SessionController
  devise_for :admins, 
    :controllers => { 
      :sessions => "admin/sessions", 
      :passwords => "admin/passwords",
      :registrations => "admin/registrations" }, :path => "admin",
    :skip => [:sessions, :passwords, :registrations] do
    get 'admin/sign_in' => 'admin/sessions#new', :as => :new_admin_session
    post 'admin/sign_in' => 'admin/sessions#create', :as => :admin_session
    get 'admin/sign_out' => 'admin/sessions#destroy', :as => :destroy_admin_session
    
    get 'admin/sign_up' => 'admin/registrations#new', :as => :new_admin_registration
    get 'admin/account' => 'admin/registrations#edit', :as => :edit_admin_registration
    post 'admin/account' => 'admin/registrations#create', :as => :admin_registration
    get 'admin/cancel' => 'admin/registrations#cancel', :as => :cancel_admin_registration
    put 'admin/account' => 'admin/registrations#update'
    delete 'admin/account' => 'admin/registrations#destroy'
    
    post 'admin/password' => 'admin/passwords#create', :as => :admin_password
    get 'admin/password/new' => 'admin/passwords#new', :as => :new_admin_password
    get 'admin/password/edit' => 'admin/passwords#edit', :as => :edit_admin_password    
    put 'admin/password' => 'admin/passwords#update'
  end