storing page on session for will_paginate

store_page_on_session

class ApplicationController < ActionController::Base
...
  before_filter :page_params, :only => :index
  
  def page_key
    (self.class.to_s + "_page").to_sym
  end
  # Use a before_filter on index action to remember the current page
  # for will_paginate.  This applies to all controllers.
  def page_params
    if params[:page] then
      session[page_key] = params[:page]
    elsif session[page_key]
      params[:page] = session[page_key]
    end
  end

class FriendController < ApplicationController
  def index
    @page_title = "Friend List"
    @friends = TwitterUser.paginate(:page => params[:page], :order => 'screen_name')
  end
end