Trying to get multiple values from GlideAjax Script Include

[Wayne Richmond]

Hi devs. I have a catalog item on the service portal that has a number of fields:

Site name [site_name] (references sys_user)

Site number [site_bun] (single line text)

RBM [rbm] (single line text)

If the current user is a site, I want it to poplate all of those fields.

I have followed best practice and tried to achieve this by calling a script include and using GlideAjax to get the data and pass it back to a catalog client script. I can do this to get a single field, however, I don't want to do multiple calls, so I've found advice on how to acheive this by passing the response as a JSON string and converting it back to a JS object where I can get the values I need. However, I've tried different variations of my code and can't get it to work. This is where I'm at:

Script include:

var MABUserUtils = Class.create(); 
MABUserUtils.prototype = Object.extendsObject(AbstractAjaxProcessor, {

     checkSite: function() {
        var checkSiteGr = new GlideRecord('sys_user');
        checkSiteGr.addQuery('sys_id', this.getParameter('sysparm_user'));
        checkSiteGr.query();
        if (checkSiteGr.next()) {
            var json = new JSON();
            var data = json.encode(checkSiteGr); //JSON formatted string  
            return data;
        }
    },
    type: 'MABUserUtils'
});

Catalog client script:

function onLoad() {

    var usr = g_user.userID;

    var ga = new GlideAjax('MABUserUtils');
    ga.addParam('sysparm_name', 'checkSite');
    ga.addParam('sysparm_user', usr);
    ga.getXMLAnswer(showMessage);
}

function showMessage(response) {
    var answer = response;
    answer = JSON.parse(answer);
    alert(answer.name);
}

The alert I get on the form:

What's wrong with my code?

[John Dewhurst]

When you want to get a record in JSON format this is pretty much the ideal use case for GlideQuery.

The following ajax script include would work with the provided client side script...

var MABUserUtils = Class.create(); 
MABUserUtils.prototype = Object.extendsObject(AbstractAjaxProcessor, {
     checkSite: function() {
        return JSON.stringify(
			new global.GlideQuery('sys_user')
			.get(this.getParameter('sysparm_user'), ["name", "email"])
			.orElse({})
		);
    },
    type: 'MABUserUtils'
});