Grails : Call JS from Controller

I have a controller with a method in it:

class teachController {

   def updateIndex () {

    // Do something here
    ----------
  }
}

Now in the GSP there's a JavaScript function:

var drawIndex (var indexValues) {

  // Do something here
 -----------------
  }

How can i call the above JavaScript function from inside the controller function?

Solution

If what you want to do is to update a table with data dynamically from the controller. I would use ajax to execute the javascript function "drawIndex()" after it calls the controller action "updateIndex()".

class teachController {
    def updateIndex(){
         // Do something here
          withFormat {
                json {  
                    render indexValues as JSON
                }
          }
    }
}

Then from your gsp you call the controller action by the name updateIndex.json and using remoteFunction

function dynamicallyUpdateTable(){
    ${remoteFunction(
           action: 'updateIndex.json',
           onSuccess: 'drawIndex(data)' 
                    )
   }
}

This will call your javascript function

 function drawIndex(indexValues){
        // Do something here
        //console.log(indexValues)
    }

And that should work. (at least in the way I like to do it) Hope it helps.