gem six auth concern usage example

application_controller.rb

# app/controllers/web/application_controller.rb
 
class Web::ApplicationController < ApplicationController
  include Concerns::Auth
 
  rescue_from AccessDenied, :with => :access_denied_handler
 
 
  private
 
  def can?(action, subject = current_user)
    abilities << subject
    abilities.allowed?(current_user, action, subject)
  end
 
  def current_user_session
    @current_user_session ||= ::User::Session.find
  end
 
  def current_user
    @current_user ||= (current_user_session && current_user_session.record) || Guest.new
  end
 
  def access_denied_handler
    flash[:error] = t('helpers.auth.unauthorized')
    redirect_back_or_default auth_login_path
  end
end