some changes in redirect if user not logged in

app/controllers/users/sessions_controller.rb

+class Users::SessionsController < Devise::SessionsController
+  def new
+    super
+  end
+
+  def create
+    auth_options = { :recall => "#{'home#index'}" }
+    self.resource = warden.authenticate!(auth_options)
+    set_flash_message(:notice, :signed_in) if is_navigational_format?
+    sign_in(resource_name, resource)
+    if !session[:return_to].blank?
+      redirect_to session[:return_to]
+      session[:return_to] = nil
+    else
+      respond_with resource, :location => after_sign_in_path_for(resource)
+    end
+  end
+end
\ No newline at end of file

app/controllers/users_controller.rb

 class UsersController < ApplicationController
-  # skip_before_filter :verify_authenticity_token
+  before_filter :authenticate_user!
 
   def index
     @users = collection

app/views/layouts/application.html.haml

@@ -26,7 +26,7 @@
     %link{:href => "favicons/apple-touch-icon180.png", :rel => "apple-touch-icon", :sizes => "180x180"}
   %body
     = render 'partials/modal'
-    - if current_page?(root_path)
+    - if current_page?(root_path) || current_page?('/users/sign_in')
       = render 'partials/black_header'
     - else
       = render 'partials/white_header'

config/routes.rb

 Rails.application.routes.draw do
   root 'home#index'
   devise_for :users, controllers: {omniauth_callbacks: "users/omniauth_callbacks",
-	  							   registrations: "users", sessions: "users"}
+	  							   registrations: "users", sessions: "users/sessions"}
   resources :users
 end