Login Redirection - ApplicationController

application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery
  check_authorization :unless => :devise_controller?

  unless Rails.application.config.consider_all_requests_local
    rescue_from CanCan::AccessDenied, :with => :render_forbidden
  end

  private

  def render_forbidden(exception)
    if user_signed_in?
      render :template => "/error/403.html.erb", :status => 403
    else
      session[:post_auth_path] = request.env['PATH_INFO']
      redirect_to new_user_session_path
    end
  end
end