gistfile1.rb

def current_order(create_order_if_necessary = false)
  return @current_order if @current_order
  if session[:order_id]
    current_order = Spree::Order.find_by_id(session[:order_id], :include => :adjustments)
    @current_order = current_order unless current_order.try(:completed?)
  end
  if create_order_if_necessary and (@current_order.nil? or @current_order.completed?)
    @current_order = Spree::Order.new
    before_save_new_order
    @current_order.save!
    after_save_new_order
  end
  session[:order_id] = @current_order ? @current_order.id : nil
  @current_order
end