title: Grails - @Transactional annotation on generating simple Controller
body: <p>Grails newb here. I was using GGTS to generate a controller for a simple User model (string user, string passed)</p>
  
  <p>On looking at the GGTS generated code, I noticed that there is @Transactional annotation on certain actions like delete(), save() and update().</p>
  
  <p>My question is, why is @Transactional used in the controller and why is @Transactional not used in Services?</p>
  
  <p>Newb in grails</p>