rails redirect some more pages back than redirect_to :back

redirect_pages_back.rb

#ApplicationController

  after_action :set_pages

  def set_pages
    max_size = 5
    session[:pages] = [] unless session[:pages]
    session[:pages].shift while(session[:pages].size >= max_size)
    session[:pages] << request.original_url
  end


# ApplicationHelper

  def pages_back(count)
    len = session[:pages].size
    session[:pages][len-count]
  end