fix: BOM has not attr required items (backport #44598) (#44600)

fix: BOM has not attr required items (#44598)

(cherry picked from commit 42d238da14)

Co-authored-by: rohitwaghchaure <rohitw1991@gmail.com>
(cherry picked from commit 608eaaa482)

erpnext/manufacturing/doctype/bom/bom.js

@@ -255,12 +255,14 @@ frappe.ui.form.on("BOM", {
 			});
 		}
 
+		if (!skip_qty_field) {
 			fields.push({
 				fieldtype: "Check",
 				label: __("Use Multi-Level BOM"),
 				fieldname: "use_multi_level_bom",
 				default: 1,
 			});
+		}
 
 		if (!skip_qty_field) {
 			fields.push({
@@ -306,6 +308,13 @@ frappe.ui.form.on("BOM", {
 						fieldtype: "Link",
 						in_list_view: 1,
 						reqd: 1,
+						get_query() {
+							return {
+								filters: {
+									has_variants: 1,
+								},
+							};
+						},
 					},
 					{
 						fieldname: "variant_item_code",
@@ -326,6 +335,13 @@ frappe.ui.form.on("BOM", {
 								},
 							};
 						},
+						change() {
+							let doc = this.doc;
+							if (!doc.qty) {
+								doc.qty = 1.0;
+								this.grid.set_value("qty", 1.0, doc);
+							}
+						},
 					},
 					{
 						fieldname: "qty",

erpnext/manufacturing/doctype/work_order/work_order.py

@@ -1360,7 +1360,9 @@ def add_variant_item(variant_items, wo_doc, bom_no, table_name="items"):
 		args["amount"] = flt(args.get("required_qty")) * flt(args.get("rate"))
 		args["uom"] = item_data.stock_uom
 
-		existing_row = get_template_rm_item(wo_doc, item.get("item_code"))
+		existing_row = (
+			get_template_rm_item(wo_doc, item.get("item_code")) if table_name == "required_items" else None
+		)
 		if existing_row:
 			existing_row.update(args)
 		else: