gistfile1.rb

  def thank_you
    authenticate_user!
    redirect_to(coupons_path) and return unless session[:payment_id]

    @payment = Payment.find(session.delete(:payment_id))
    offers = Offer.usual.city(current_user.city).public_only.published

    if @payment.purpose == 'order'
      deal = @payment.offer.offer_description
      offers -= (deal.main_multi_merchant_deal || deal).offers
    end

    @offers = Recommender.thanks_page(current_user, deal, offers).first(3)
    @offers = offers.uniq(&:offer_description_id).first(3) if @offers.size < 3
  end