update sale order talble

db/migrate/20170403140820_create_order_items.rb

@@ -13,6 +13,7 @@ class CreateOrderItems < ActiveRecord::Migration[5.1]
       t.string :options
       t.json :set_menu_items #this parameter is require to route the items correctly
       t.boolean :taxable, :null => false, :default => true
+      t.string :completed_by
       t.timestamps
     end
   end