Auto populate the computer name field

[sailor_moon]

I'm creating a catalog item wherein I need to auto populate the computer name field and the type of my computer name field is lookup field. I'm having a hard time with the catalog client script and script include. Can someone help me with this since I tried to research but it's not working in my side.

[SP22 · Accepted solution]

Hi,
you can modify the code as per your requirement and please let me know whether it is useful or not.

script include

var PopulateWorkstationName = Class.create();
PopulateWorkstationName.prototype = Object.extendsObject(AbstractAjaxProcessor, {
    getComputer: function() {
        var computer = '';
        var uid = this.getParameter('sysparm_usid');
        var com = new GlideRecord('cmdb_ci_computer');
        com.addQuery('assigned_to', uid);
        com.query();
        if (com.next()) {
            computer = com.sys_id;
        }
        return computer;
    },
    type: 'PopulateWorkstationName'
});

On-load Client script

function onLoad() {
    //Type appropriate comment here, and begin script below
    var user = g_form.getValue('caller_id');
    var ga = new GlideAjax('PopulateWorkstationName');
    ga.addParam("sysparm_name", "getComputer");
    ga.addParam("sysparm_usid", user);
    ga.getXML(getResponse);
}

function getResponse(response) {
    var answer = response.responseXML.documentElement.getAttribute("answer");
    g_form.setValue('u_user_computer', answer); //you can mention your field name.
}

Thanks
SP.

[SP22]

I have provided above code. please verify it and let me know @sailor_moon 

[sailor_moon]

Hi @SP22 I tried to modify your code but when I change my g_form.setValue(computer_name, answer)

This is what I got 

[SP22]

Hi @sailor_moon ,
can you please send me the full screenshot.
you need to go to type specification add reference table as cmdb_ci_computer (refer screenshot of @Murthy Ch )