1  #---
   2  # Excerpted from "Agile Web Development with Rails, 3rd Ed.",
   3  # published by The Pragmatic Bookshelf.
   4  # Copyrights apply to this code. It may not be used to create training material, 
   5  # courses, books, articles, and the like. Contact us if you are in doubt.
   6  # We make no guarantees that this code is fit for any purpose. 
   7  # Visit http://www.pragmaticprogrammer.com/titles/rails3 for more book information.
   8  #---
   9 
  10 
  11 
  12  class Order < ActiveRecord::Base
  13    
  14    PAYMENT_TYPES = [
  15      #  Displayed       stored in db
  16      [ "Check",          "check" ],
  17      [ "Credit card",    "cc" ],
  18      [ "Purchase order", "po" ]
  19    ]
  20 
  21 
  22    # ...
  23    
  24    
  25    validates_presence_of :name, :address, :email, :pay_type
  26    validates_inclusion_of :pay_type, :in => 
  27      PAYMENT_TYPES.map {|disp, value| value}
  28 
  29    # ...
  30    
  31 
  32 
  33    
  34    has_many :line_items
  35    
  36 
  37    
  38    def add_line_items_from_cart(cart)
  39      cart.items.each do |item|
  40        li = LineItem.from_cart_item(item)
  41        line_items << li
  42      end
  43    end
  44    
  45 
  46  end
  47