Dynamically remove reference qualifier onChange script

[dougpenta]

Is there a way to remove a reference qualifier acting on a Service Catalog variable when a user changes the value on another variable?

 Ex.

Field A (True/False)

Field B (Reference field)

if(Field A changes)

Field B (remove reference qualifier)

[Ankur Bawiskar]

@dougpenta 

you can use advanced ref qualifier which depends on other variable.

using client script not possible to change reference qualifier

You are ServiceNow employee, you can check internally with the product team if you wish to.

💡 If my response helped, please mark it as correct ✅ and close the thread 🔒— this helps future readers find the solution faster! 🙏

[Ankur Bawiskar]

@dougpenta 

Hope you are doing good.

Did my reply answer your question?

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[Tanushree Maiti]

You can use an if statement as using the javascript: prefix enables that field to accept JavaScript.

If it's a bit more complex, then you can use a Script Include as well.

So use if statement , it's like:

javascript&colon; var queryVarB; if (current.variables.variable_A = = True) { queryVarB="<encodedQuery1>"; } else { queryVarB="encodedQuery2"; } queryVarB; 

[Srikanth_9]

Hi @dougpenta,

Yes, you can dynamically remove (or re‑apply) a reference qualifier on a Service Catalog variable when another variable changes, by using an onChange Catalog Client Script.

• Field A → True/False (Checkbox)
• Field B → Reference variable
• Requirement:
  When Field A changes, remove the reference qualifier on Field B.

You do not remove the dictionary qualifier. You override it at runtime using g_form.setReferenceQualifier().

Create an onChange Catalog Client Script

• Type: onChange
• Variable name: field_a 
• UI Type: All
• Applies to: Catalog Item 

function onChange(control, oldValue, newValue, isLoading) {

    if (isLoading) {

        return;

    }

    if (newValue == 'true') {

        //Way to remove restriction

        g_form.setReferenceQualifier('field_b', 'sys_idISNOTEMPTY');

    } else {

        // Restore original qualifier

        g_form.setReferenceQualifier('field_b', 'active=true');

    }

    // Clear value to prevent invalid selections

    g_form.clearValue('field_b');

    // Required to re-evaluate the qualifier

    g_form.refreshReference('field_b');

}

If the provided solution is useful/working, please Accept as Solution and hit the Helpful. 

Thanks & Regards,

Srikanth Akula.