Question

How can I call a method in one of my controller classes without grails trying to generate a view?

Answer 1

You can redirect to another controller action.

class PuppyController {

   def woof() {
     redirect(action:'bark')
   }

   def bark(){
     response.write "Moo"
   }

}

At some point you should either write to the response or redirect to a method/closure that corresponds to a view so the user can receive the output.

If the method you’re trying to call is on another controller, chances are YOAR DOING IT WRONG.

If, for example, I have a controller method that uploads a file, and another method that creates the filename for that file as a combination of some convention I make up (say timestamp + “pretty file for” + username) on another controller, you should promote that controller method to a Service and inject it into both controllers.