Reference field in Modal not showing values in Workspace

[vluz]

Hello Community,

I’m currently working on a project within the Customer Service Management Workspace in ServiceNow. I’m aiming to implement a UI Action that either calls a GlideModel or displays a simple popup with a single reference field.

I previously shared some code where I tried to trigger a show modal action, but it didn't quite work as expected. I’d love to get some guidance on what might be going wrong and how to properly implement this.

Specifically, I’m looking for advice on:

1. The best practices for creating the UI Action.

2. How to integrate a GlideModel to handle data.

3. How to create a user-friendly popup with the reference field.

Any help or examples would be greatly appreciated!


Code I used in which the reference field is not retrieving any values:

function onClick(g_form) {

    var fields = [{

            type: 'reference',

            name: 'assignment_group',  //Give your custom reference field

            label: getMessage('Notify On-Call Group'), //Give as per your requirement

            mandatory: true,

            reference: 'sys_user_group', //Give which table your custom field refers to

            referringTable: 'incident', //Give your custom table

            referringRecordId: g_form.getUniqueValue()

        }

    ];

    g_modal.showFields({

        title: "Enter your details",

        fields: fields,

        size: 'lg'

    }).then(function(fieldValues) {

        // g_form.setValue('caller_id', fieldValues.updatedFields[2].value);

        // g_form.save();

    });

}
Results screenshot:

Keeps searching and dont find anything