GlideAjax returns null value

[Lon Landry4]

I have an onSubmit catalog client script & script includes. I am trying to populate the State (install_status) with asset matching a catalog variable. I have checked like posts but the solutions have not worked for me.

Client script (isolate script is false)

function onSubmit() {

  // Get the sys_id of the first_asset_returning variable

  var firstAssetSysId = g_form.getValue('first_asset_returning');

  // Use GlideAjax to call the server-side script

  var ga = new GlideAjax('PopulateFirstState'); 

  ga.addParam('sysparm_name', 'getInstallStatus');

  ga.addParam('sysparm_first_asset_returning_sys_id', firstAssetSysId);

  // Callback function for success

  ga.getXML(function (response) {

    var answer = response.responseXML.documentElement.getAttribute("answer");

    // Set the value of the first_state variable with the received answer

    g_form.setValue('first_state', answer);

alert(answer);

  });

}

Script includes (client callable is true, Accessible from All application scopes)

var PopulateFirstState = Class.create();

PopulateFirstState.prototype = Object.extendsObject(AbstractAjaxProcessor, {

  getInstallStatus: function () {

    // Get the sys_id parameter from the client-side

    var firstAssetSysId = this.getParameter('sysparm_first_asset_returning_sys_id');

    // Query the alm_hardware table to get the install_status value

    var hardwareGr = new GlideRecord('alm_hardware');

    if (hardwareGr.getValue(firstAssetSysId)) {

      var InstallStatus = hardwareGr.getValue('install_status');

      return InstallStatus;

    }  

  } 

});

[Tai Vu]

Hi @Lon Landry4 

There's a couple of things below you can give a try.

1. In your script include, you're using getValue while getting a record. So let's change this line below.

From

if (hardwareGr.getValue(firstAssetSysId))

To

if (hardwareGr.get(firstAssetSysId))

2. It should be an OnChange Client Script instead of OnSubmit for your case.

3. You may want to check the Auto-populate feature.

Auto-populate a variable based on a reference type variable (Utah)

Cheers,

Tai Vu