How to call an action without generating a view in grails

Question

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

An action in a controller always has to send something back to the user. But it doesn't have to be a GSP page, or HTML at all, you can construct a response of any type yourself. As nate suggests, we need to know what you want to achieve to be able to help you find a solution. — David, Mar 31 '12 at 22:28
This question is perfectly valid. It's in the vein of what LinkedIn is doing with Scala and composing responses: http://engineering.linkedin.com/play/composable-and-streamable-play-apps — cdeszaq, Jan 22 '14 at 22:21

score 4 · Accepted Answer · answered Apr 01 '12 at 06:17

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.

score 3 · Answer 2 · edited Apr 07 '12 at 01:42

3

class FooController {

  def fooAction() {
    render("Successful call to fooAction")
  }

}

edited Apr 07 '12 at 01:42

animuson

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answered Apr 01 '12 at 06:27

Hussain Fakhruddin

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score 0 · Answer 3 · answered Apr 01 '12 at 08:09

0

Essentially you can create a controller instance (via 'new' keyword) and then call the action of interest. Please provide more details about what you want to do, so i might be able to give a better answer...

answered Apr 01 '12 at 08:09

vyakhir

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How to call an action without generating a view in grails

3 Answers3