Update Sales Order Item while creating sales order

[NCP]

Reference:

Sum fields in child table and show total in parent field

Hi @msiam, Please apply custom/client script. frappe.ui.form.on('Sales Invoice', { validate: function(frm) { ttl_itms_dicnt = 0; $.each(frm.doc.items, function(i, d) { ttl_itms_dicnt += flt(d.discount_amount); }); frm.doc.total_items_discount = ttl_itms_dicnt; } }); Please check your field name and set it according. Then reload and check it. Thank You!