fix: validate component quantity according to BOM (backport #43011) (#43014)

* fix: validate component quantity according to BOM (#43011)

(cherry picked from commit f3b91d4d62)

# Conflicts:
#	erpnext/manufacturing/doctype/manufacturing_settings/manufacturing_settings.json

* chore: fix conflicts

---------

Co-authored-by: rohitwaghchaure <rohitw1991@gmail.com>

erpnext/stock/doctype/stock_entry/stock_entry.py

@@ -232,6 +232,7 @@ class StockEntry(StockController):
 		self.validate_serialized_batch()
 		self.calculate_rate_and_amount()
 		self.validate_putaway_capacity()
+		self.validate_component_quantities()
 
 		if not self.get("purpose") == "Manufacture":
 			# ignore scrap item wh difference and empty source/target wh
@@ -747,6 +748,34 @@ class StockEntry(StockController):
 					title=_("Insufficient Stock"),
 				)
 
+	def validate_component_quantities(self):
+		if self.purpose not in ["Manufacture", "Material Transfer for Manufacture"]:
+			return
+
+		if not frappe.db.get_single_value("Manufacturing Settings", "validate_components_quantities_per_bom"):
+			return
+
+		if not self.fg_completed_qty:
+			return
+
+		raw_materials = self.get_bom_raw_materials(self.fg_completed_qty)
+
+		precision = frappe.get_precision("Stock Entry Detail", "qty")
+		for row in self.items:
+			if not row.s_warehouse:
+				continue
+
+			if details := raw_materials.get(row.item_code):
+				if flt(details.get("qty"), precision) != flt(row.qty, precision):
+					frappe.throw(
+						_("For the item {0}, the quantity should be {1} according to the BOM {2}.").format(
+							frappe.bold(row.item_code),
+							flt(details.get("qty"), precision),
+							get_link_to_form("BOM", self.bom_no),
+						),
+						title=_("Incorrect Component Quantity"),
+					)
+
 	@frappe.whitelist()
 	def get_stock_and_rate(self):
 		"""