Add created_by_user_id to Order table

db/migrate/20121112093327_add_created_by_user_id_to_orders.rb

@@ -0,0 +1,9 @@
+class AddCreatedByUserIdToOrders < ActiveRecord::Migration
+  def self.up
+    add_column :orders, :created_by_user_id, :integer
+  end
+
+  def self.down
+    remove_column :orders, :created_by_user_id
+  end
+end