application_controller

gistfile1.rb

class ApplicationController < ActionController::Base
  protect_from_forgery
  
  helper_method :current_user
  
  private
  
  def current_user
    @current_user ||= User.find(session[:user_id]) if session[:user_id]
  end
  
  def signed_in?
    current_user.present?
  end
end