fix: same Serial No get mapped while creating SO -> DN (#37527)

* fix: same Serial No get mapped while creating SO -> DN

* test: add test case for DN with repetitive serial item

erpnext/controllers/accounts_controller.py

@@ -617,6 +617,7 @@ def set_missing_item_details(self, for_validate=False):
 
 			self.pricing_rules = []
 
+			selected_serial_nos_map = {}
 			for item in self.get("items"):
 				if item.get("item_code"):
 					args = parent_dict.copy()
@@ -628,6 +629,7 @@ def set_missing_item_details(self, for_validate=False):
 					args["ignore_pricing_rule"] = (
 						self.ignore_pricing_rule if hasattr(self, "ignore_pricing_rule") else 0
 					)
+					args["ignore_serial_nos"] = selected_serial_nos_map.get(item.get("item_code"))
 
 					if not args.get("transaction_date"):
 						args["transaction_date"] = args.get("posting_date")
@@ -684,6 +686,11 @@ def set_missing_item_details(self, for_validate=False):
 					if ret.get("pricing_rules"):
 						self.apply_pricing_rule_on_items(item, ret)
 						self.set_pricing_rule_details(item, ret)
+
+					if ret.get("serial_no"):
+						selected_serial_nos_map.setdefault(item.get("item_code"), []).extend(
+							ret.get("serial_no").split("\n")
+						)
 				else:
 					# Transactions line item without item code
 

erpnext/stock/doctype/delivery_note/test_delivery_note.py

@@ -5,7 +5,7 @@
 import json
 
 import frappe
-from frappe.tests.utils import FrappeTestCase
+from frappe.tests.utils import FrappeTestCase, change_settings
 from frappe.utils import add_days, cstr, flt, nowdate, nowtime, today
 
 from erpnext.accounts.doctype.account.test_account import get_inventory_account
@@ -1284,6 +1284,33 @@ def test_packed_items_for_return_delivery_note(self):
 		self.assertEqual(return_dn.packed_items[0].batch_no, dn.packed_items[0].batch_no)
 		self.assertEqual(return_dn.packed_items[1].serial_no, dn.packed_items[1].serial_no)
 
+	@change_settings("Stock Settings", {"automatically_set_serial_nos_based_on_fifo": 1})
+	def test_delivery_note_for_repetitive_serial_item(self):
+		# Step - 1: Create Serial Item
+		item, warehouse = (
+			make_item(
+				properties={"is_stock_item": 1, "has_serial_no": 1, "serial_no_series": "TEST-SERIAL-.###"}
+			).name,
+			"_Test Warehouse - _TC",
+		)
+
+		# Step - 2: Inward Stock
+		make_stock_entry(item_code=item, target=warehouse, qty=5)
+
+		# Step - 3: Create Delivery Note with repetitive Serial Item
+		dn = create_delivery_note(item_code=item, warehouse=warehouse, qty=2, do_not_save=True)
+		dn.append("items", dn.items[0].as_dict())
+		dn.items[1].qty = 3
+		dn.save()
+		dn.submit()
+
+		# Test - 1: Serial Nos should be different for each line item
+		serial_nos = []
+		for item in dn.items:
+			for serial_no in item.serial_no.split("\n"):
+				self.assertNotIn(serial_no, serial_nos)
+				serial_nos.append(serial_no)
+
 	def tearDown(self):
 		frappe.db.rollback()
 		frappe.db.set_single_value("Selling Settings", "dont_reserve_sales_order_qty_on_sales_return", 0)

erpnext/stock/get_item_details.py

@@ -160,6 +160,7 @@ def update_stock(args, out):
 		and out.warehouse
 		and out.stock_qty > 0
 	):
+		out["ignore_serial_nos"] = args.get("ignore_serial_nos")
 
 		if out.has_batch_no and not args.get("batch_no"):
 			out.batch_no = get_batch_no(out.item_code, out.warehouse, out.qty)
@@ -1140,6 +1141,8 @@ def get_serial_nos_by_fifo(args, sales_order=None):
 			query = query.where(sn.sales_order == sales_order)
 		if args.batch_no:
 			query = query.where(sn.batch_no == args.batch_no)
+		if args.ignore_serial_nos:
+			query = query.where(sn.name.notin(args.ignore_serial_nos))
 
 		serial_nos = query.run(as_list=True)
 		serial_nos = [s[0] for s in serial_nos]
@@ -1450,6 +1453,7 @@ def get_serial_no(args, serial_nos=None, sales_order=None):
 					"item_code": args.get("item_code"),
 					"warehouse": args.get("warehouse"),
 					"stock_qty": args.get("stock_qty"),
+					"ignore_serial_nos": args.get("ignore_serial_nos"),
 				}
 			)
 			args = process_args(args)