Calculation of data from child table

[magic-overflow]

Sum of item qty in sales invoice

can you try the following code? total function fires when item add and remove. frappe.ui.form.on("Sales Invoice Item", { items_add: function(doc,cdt,cdn){ cur_frm.cscript.total(doc.doc,cdt,cdn); }, items_remove: function(doc,cdt,cdn){ cur_frm.cscript.total(doc.doc,cdt,cdn); } }); cur_frm.cscript.total = function(doc,cdt,cdn) { var total_qty = 0; $.each(doc.items || [], function(i, d) { total_qty += flt(d.qty); }); cur_frm.set_value(“net_weight”, total_qty…

It’s similar to yours.