app/models/line_item.rb

   1 class LineItem < ActiveRecord::Base
   2   belongs_to :order
   3   belongs_to :product
   4
   5 #  def self.from_cart_item(cart_item)
   6 #    li = self.new
   7 #    li.product      = cart_item.product
   8 #    li.quantity     = cart_item.quantity
   9 #    li.total_price  = cart_item.price
  10 #    li
  11 #  end
  12 end