Currently is seems that for any code change in a sails.js app you have to manually stop the sails server and run sails lift again before you can see the changes
sails lift
If you're using Sails 0.11, you can install this hook to automatically reload when you change models or controllers (views do not require reloading):
npm install sails-hook-autoreload
https://www.npmjs.com/package/sails-hook-autoreload