How I Render A Html/JavaScript In Grails Controller?

Question

I have a controller code like this :

def test23() {
        //params.id23 is been passed via ajax calls
        def find = User.findByUsernameLike("${params.id23}")
        println find
        render """<script type="text/javascript"> alert("hi"); </script>""" 
    }

This code is called using jquery's ajax method. Well, it works well, that is , I get output printed on my console, but the render part is not working (I'm not getting the alert).

What I done is correct? Or anything else need to be passed to render those scripts?

shudder... view code in the controller ;-) -- As a more helpful comment, you should really consider not doing this in the controller, and moving it into the view. So the AJAX requests a value, receives a Json object containing 'hi' and then calls alert or something. Or look at templating frameworks in javascript... It really depends what you're trying to achieve... — tim_yates
– tim_yates, Commented Feb 29, 2012 at 14:05
@tim_yates : I just want to know whether that works, wont put in my code though. But even though render should show me a alert, it doesn't that's why asked here :) — Ant's
– Ant's, Commented Feb 29, 2012 at 14:09
@tim_yates: thanks for that advice. I need to just append some data's to the DOM (i.e to some id elements so that user can see it), after user selecting a value from drop-down list box :) — Ant's
– Ant's, Commented Feb 29, 2012 at 14:18
in that situation, I'd render a map as JSON, and deal with attaching it to the DOM client-side — tim_yates
– tim_yates, Commented Feb 29, 2012 at 14:22
@tim_yates: I have a quick question, I heard of JSON, but haven't tried it. Lets say I want attach a div to DOM, div has only one line content in it. In that case to, using a JSON matters? — Ant's
– Ant's, Commented Feb 29, 2012 at 14:32

Dónal · Accepted Answer · 2012-02-29 14:03:11Z

4

try this instead:

render text: """<script type="text/javascript"> alert("hi"); </script>""",
        contentType: 'js'

or possibly:

render text: """<script type="text/javascript"> alert("hi"); </script>""", 
        contentType: 'text/javascript'

answered Feb 29, 2012 at 14:03

Dónal

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1 Comment

dbrin Over a year ago

I am with Tim on this, returning script tag is not very MVCish. You should definitely return JSON or an html fragment from a template.

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