Calling Grails def from Javascript

Question

I'm attempting to make an ajax request to a very simple Grails method:

def countRace() {
    Date date = params.date("date", 'yyyy-MM-dd');
    Integer count = Race.countByDate(date);
    log.info("Number of races on " + date + " is " + count);
    return [count : count]
}

And I am using the following jQuery code to do it:

function updateDayRaceCount(id) {
    $.ajax({
       url: "${g.createLink(controller:'data', action:'countRace')}?date=" + id
    }).done(function(response) {
       alert(response);
    });
}

I am seeing the logs fire on the server, so I know the method is being hit:

grails.app.controllers.runnerdb.DataController Number of races on Thu Mar 06 00:00:00 GMT 2014 is 38

But the ajax request is erroring out with a 404. When I observed the error, I found that it was the Tomcat standard 404 page, and the URL that was being generated, that looks like this:

/runnerdb/data/countRace?date=<id here>

Was being mapped to:

 /runnerdb/WEB-INF/grails-app/views/data/countRace.jsp

This is where the issue is, because I imagine Tomcat or grails are trying to render a non-existent view.

My question is..

How to I stop this kind of behaviour in grails for just this one method, and force it to simply return the int value?

Joshua Moore · Accepted Answer · 2014-03-17 12:11:35Z

3

By default Grails resolves views by convention. In your case you will need to use render instead of return. By using return you are telling Grails to continue the processing to a view using your return as the model.

Here is an example of rendering a text value:

render(text: count)

Alternatively you may want to render your results as JSON (provided you import the converter):

render [count: count] as JSON

answered Mar 17, 2014 at 12:11

Joshua Moore

24.8k6 gold badges52 silver badges73 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

christopher Over a year ago

Instantly solved the issue. I swear, one day I'll get the hang of this!

Collectives™ on Stack Overflow

Calling Grails def from Javascript

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related