Hide Opened_For from the Assigned To Choice Selection for HR Case

[Hari7]

Hide Opened_For from the Assigned To Choice Selection for HR Case

Wrote onLoad Client Script but it didnt work.

function onLoad() {
    // Get the 'Opened For' user's sys_id
    var openedForUserSysId = g_form.getValue('opened_for');

    // Get the HR Service value
    var hrServiceValue = g_form.getValue('hr_service');

    // Get the Assignment Group
    var assignmentGroup = g_form.getValue('assignment_group');

    // Check if the HR Service and Assignment Group match the specified values
    if (hrServiceValue == '2bd814771ba38dd0d1a59938b04bcbc8' && assignmentGroup == 'b25370019f22120047a2d126c42e705c') {
        // Set the reference qualifier to exclude the 'Opened For' user
        var referenceQualifier = 'sys_id!=' + openedForUserSysId;

        // Apply the reference qualifier to the 'assigned_to' field
        g_form.setReferenceQualifier('assigned_to', referenceQualifier);

        // Check if the 'assigned_to' field is pre-populated with the 'Opened For' user and clear it if necessary
        var assignedToValue = g_form.getValue('assigned_to');
        if (assignedToValue == openedForUserSysId) {
            // Clear the 'assigned_to' field if it contains the 'Opened For' user
            g_form.setValue('assigned_to', '');
        }
    }
}

Can you please let me know if there is anything wrong in the code or any other method to achieve this logic. 

[jcmings]

@Hari7 

Here's a post where someone solved for the same thing. It looks like you'll need a script include and an Advanced Reference Qualifier on the field. Here is a link to the docs on reference qualifiers.

If you're trying to do this on a catalog item, reference this post.