Dynamic reference qualifier not updating PO list on Catalog Item

[PrasadShelar-]

Hi Community,

I’m working on a Catalog Item in where I need to dynamically refresh a reference field (Purchase Order) that points to a custom table u_ast_purchase_order.

The Purchase Order list must refresh whenever the Master Agreement reference field changes - without reloading the form.

FYI: refresh_purchase_order_toggle - Toggle variable

Below is the reference qualifier I am currently using on the Purchase Order variable:

javascript:(function() { 

if (current.variables.refresh_purchase_order_toggle) { 

var list = new x_hpmms_change_man.MoveNonContractualAssetstoContractualCatalog() .getPurchaseOrdersForMasterAgreement(current.variables.master_agreement + ""); 

return 'sys_idIN' + list; 
} 
return '';

})();

My issue
In Service Portal, the reference field does not refresh properly when Master Agreement changes. I don’t want to reload the form — just refresh the available PO list based on the Script Include logic. 

Looking for guidance on:

Correct approach to refresh reference fields dynamically without refreshing/reloading the catalog item form
Whether my toggle logic + reference qualifier structure is correct
Any best practices to make reference qualifiers react to other reference variable changes

Scenario - 

• User opens the Catalog Item form.
• User selects a Master Agreement (reference field).
• Purchase Order (reference field) should filter based on the selected Master Agreement.
• If no matching PO exists, the user sees a Rich Text message with a hyperlink to Create Purchase Order (another Record Producer).
• User clicks the link, fills out the Create PO form, and submits.
• User returns to the original Catalog Item form.
• Expected Behavior: The newly created Purchase Order should now appear in the PO reference list without reloading the form.
• Actual Behavior: Newly created Purchase order not appear in Purchase Order field without reloading field. 

Thanks for any help!

[Ankur Bawiskar]

@PrasadShelar- 

what type of variable is this -> refresh_purchase_order_toggle 

If something gets changed in that then only the other variable will be filtered

try this once

javascript: var query;
if (current.variables.refresh_purchase_order_toggle) { 
var list = new x_hpmms_change_man.MoveNonContractualAssetstoContractualCatalog() .getPurchaseOrdersForMasterAgreement(current.variables.master_agreement + ""); 
query = 'sys_idIN' + list; 
} 
query = '';
query;

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