Reference qualifier not working as expected when Assigned To is cleared

tilekarnilesh · ‎09-23-2025

Hello ,

I’m working on a Change Task (CTASK) form where we have three user reference fields:

Assigned To-

Change Observer--

Change Reviewer-->

The requirement is that the same person cannot be assigned to multiple fields.
So, for example, if a user is selected as the Change Reviewer, they should not appear in Change Observer or Assigned To, and vice versa.

This works fine when I first choose Assigned To, and then select the other fields — it correctly prevents duplicates.

The issue:

If I first select Change Reviewer or Change Observer, and then try to select Assigned To, the same user is still available to pick.

Thanks in advanced.😊

Ankur Bawiskar · ‎09-23-2025

@tilekarnilesh

advanced ref qualifier looks fine to me.

another way is to use onSubmit client script and check this

function onSubmit() {
    var user1 = g_form.getValue('u_change_reviewer'); // Replace with your field names
    var user2 = g_form.getValue('u_change_observer');
    var user3 = g_form.getValue('assigned_to');

    // Check for repeats among the three reference fields
    if ((user1 && user1 == user2) ||
        (user1 && user1 == user3) ||
        (user2 && user2 == user3)) {
        g_form.addErrorMessage('Only unique users are allowed');
        return false; // Prevent submission
    }

    return true; // Allow submission
}

If my response helped please mark it correct and close the thread so that it benefits future readers.

Regards,
Ankur
✨ Certified Technical Architect || ✨ 9x ServiceNow MVP || ✨ ServiceNow Community Leader

View solution in original post

GlideFather · ‎09-23-2025

Hi @tilekarnilesh,

you will might need to achieve this with onChange client script

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This reply is 100 % GlideFather and 0 % AI

tilekarnilesh · ‎09-23-2025

@GlideFather How??

GlideFather · ‎09-23-2025

@tilekarnilesh it will be 3 client scripts one for each field and you will add conditions that each of the field is changed, then it will checked the values in the other two

Navigate to: The GlideForm (g_form) Class and check for getValue()

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This reply is 100 % GlideFather and 0 % AI

Nawal Singh · ‎09-23-2025

Hi @tilekarnilesh

Please test your requirement with the above code and screenshot that i have shared and let me know .

if my response is helpful please mark as helpful and accept the solution

Thank you!!