Merge pull request #58007 from frappe/codex/backport-57963-version-16

fix(manufacturing): correct nested BOM Explorer quantities

erpnext/manufacturing/report/bom_explorer/bom_explorer.py

@@ -24,7 +24,8 @@ def get_exploded_items(bom, data, indent=0, qty=1):
 		fields=[
 			"qty",
 			"bom_no",
-			"qty",
+			"bom_no.quantity as child_bom_qty",
+			"stock_qty",
 			"item_code",
 			"item_name",
 			"description",
@@ -51,7 +52,12 @@ def get_exploded_items(bom, data, indent=0, qty=1):
 			}
 		)
 		if item.bom_no:
-			get_exploded_items(item.bom_no, data, indent=indent + 1, qty=item.qty)
+			get_exploded_items(
+				item.bom_no,
+				data,
+				indent=indent + 1,
+				qty=qty * item.stock_qty / item.child_bom_qty,
+			)
 
 
 def get_columns():

erpnext/manufacturing/report/bom_explorer/test_bom_explorer.py

@@ -0,0 +1,42 @@
+# Copyright (c) 2026, Frappe Technologies Pvt. Ltd. and Contributors
+# See license.txt
+
+import unittest
+from unittest.mock import patch
+
+import frappe
+
+from erpnext.manufacturing.report.bom_explorer.bom_explorer import get_exploded_items
+
+
+class TestBOMExplorer(unittest.TestCase):
+	def test_nested_bom_normalizes_and_accumulates_qty(self):
+		def item(item_code, qty, stock_qty, bom_no="", uom="Nos", child_bom_qty=None):
+			return frappe._dict(
+				item_code=item_code,
+				item_name=item_code,
+				description="",
+				qty=qty,
+				stock_qty=stock_qty,
+				bom_no=bom_no,
+				child_bom_qty=child_bom_qty,
+				uom=uom,
+				idx=1,
+				is_phantom_item=0,
+			)
+
+		children = {
+			"root": [item("parent", 2, 20, "parent-bom", "Box", 5)],
+			"parent-bom": [item("child", 3, 12, "child-bom", "Pack", 4)],
+			"child-bom": [item("raw-material", 2, 2, uom="Kg")],
+		}
+
+		def get_items(_doctype, filters, **kwargs):
+			self.assertIn("bom_no.quantity as child_bom_qty", kwargs["fields"])
+			return children[filters["parent"]]
+
+		data = []
+		with patch.object(frappe, "get_all", side_effect=get_items):
+			get_exploded_items("root", data)
+
+		self.assertEqual([row["qty"] for row in data], [2, 12, 24])