fix: prevent leakage of party-derived fields in cross doctype transactions (backport #55336) (#55578)

Co-authored-by: Nabin Hait <nabinhait@gmail.com>
Co-authored-by: Lakshit Jain <ljain112@gmail.com>
fix: prevent leakage of party-derived fields in cross doctype transactions (#55336)

erpnext/accounts/doctype/sales_invoice/sales_invoice.py

@@ -23,7 +23,12 @@ from erpnext.accounts.doctype.tax_withholding_category.tax_withholding_category
 	get_party_tax_withholding_details,
 )
 from erpnext.accounts.general_ledger import get_round_off_account_and_cost_center
-from erpnext.accounts.party import get_due_date, get_party_account, get_party_details
+from erpnext.accounts.party import (
+	CROSS_PARTY_FIELD_NO_MAP,
+	get_due_date,
+	get_party_account,
+	get_party_details,
+)
 from erpnext.accounts.utils import (
 	cancel_exchange_gain_loss_journal,
 	get_account_currency,
@@ -2559,7 +2564,7 @@ def make_inter_company_transaction(doctype, source_name, target_doc=None):
 				"doctype": target_doctype,
 				"postprocess": update_details,
 				"set_target_warehouse": "set_from_warehouse",
-				"field_no_map": ["taxes_and_charges", "set_warehouse", "shipping_address", "cost_center"],
+				"field_no_map": [*CROSS_PARTY_FIELD_NO_MAP, "set_warehouse", "cost_center"],
 			},
 			doctype + " Item": item_field_map,
 		},

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -2751,6 +2751,34 @@ class TestSalesInvoice(FrappeTestCase):
 		):
 			make_inter_company_transaction("Sales Invoice", si.name)
 
+	def test_inter_company_transaction_does_not_inherit_party_fields(self):
+		"""
+		Party-derived fields on SI (from Customer) must not leak into the mapped PI.
+		"""
+		si = create_sales_invoice(
+			company="Wind Power LLC",
+			customer="_Test Internal Customer",
+			debit_to="Debtors - WP",
+			warehouse="Stores - WP",
+			income_account="Sales - WP",
+			expense_account="Cost of Goods Sold - WP",
+			cost_center="Main - WP",
+			currency="USD",
+			do_not_save=1,
+		)
+		si.selling_price_list = "_Test Price List Rest of the World"
+		si.tax_category = "_Test Tax Category 1"
+		si.language = "ar"
+		si.payment_terms_template = "_Test Payment Term Template"
+		si.submit()
+
+		pi = make_inter_company_transaction("Sales Invoice", si.name)
+
+		supplier = frappe.get_doc("Supplier", "_Test Internal Supplier")
+		self.assertEqual(pi.tax_category or None, supplier.tax_category or None)
+		self.assertEqual(pi.language or None, supplier.language or None)
+		self.assertEqual(pi.payment_terms_template or None, supplier.payment_terms or None)
+
 	def test_inter_company_transaction_without_default_warehouse(self):
 		"Check mapping (expense account) of inter company SI to PI in absence of default warehouse."
 		# setup

erpnext/accounts/party.py

@@ -48,6 +48,25 @@ SALES_TRANSACTION_TYPES = {
 }
 TRANSACTION_TYPES = PURCHASE_TRANSACTION_TYPES | SALES_TRANSACTION_TYPES
 
+# Party-derived fields that must NOT be auto-copied by `get_mapped_doc` when the
+# source and target documents belong to different parties (e.g. Sales Order →
+# Purchase Order or inter-company Sales Invoice → Purchase Invoice).
+CROSS_PARTY_FIELD_NO_MAP = [
+	"tax_category",
+	"tax_id",
+	"tax_withholding_category",
+	"taxes_and_charges",
+	"address_display",
+	"contact_display",
+	"contact_mobile",
+	"contact_email",
+	"contact_person",
+	"shipping_address",
+	"dispatch_address",
+	"payment_terms_template",
+	"language",
+]
+
 
 class DuplicatePartyAccountError(frappe.ValidationError):
 	pass

erpnext/selling/doctype/sales_order/sales_order.py

@@ -10,6 +10,7 @@ import frappe.utils
 from frappe import _, qb
 from frappe.contacts.doctype.address.address import get_company_address
 from frappe.desk.notifications import clear_doctype_notifications
+from frappe.model.document import Document
 from frappe.model.mapper import get_mapped_doc
 from frappe.model.utils import get_fetch_values
 from frappe.query_builder.functions import Sum
@@ -20,7 +21,7 @@ from erpnext.accounts.doctype.sales_invoice.sales_invoice import (
 	update_linked_doc,
 	validate_inter_company_party,
 )
-from erpnext.accounts.party import get_party_account
+from erpnext.accounts.party import CROSS_PARTY_FIELD_NO_MAP, get_party_account
 from erpnext.controllers.selling_controller import SellingController
 from erpnext.manufacturing.doctype.blanket_order.blanket_order import (
 	validate_against_blanket_order,
@@ -1332,7 +1333,9 @@ def get_events(start, end, filters=None):
 
 
 @frappe.whitelist()
-def make_purchase_order_for_default_supplier(source_name, selected_items=None, target_doc=None):
+def make_purchase_order_for_default_supplier(
+	source_name: str, selected_items: str | list | None = None, target_doc: str | Document | None = None
+):
 	"""Creates Purchase Order for each Supplier. Returns a list of doc objects."""
 
 	from erpnext.setup.utils import get_exchange_rate
@@ -1361,7 +1364,6 @@ def make_purchase_order_for_default_supplier(source_name, selected_items=None, t
 		target.shipping_rule = ""
 		target.tc_name = ""
 		target.terms = ""
-		target.payment_terms_template = ""
 		target.payment_schedule = []
 
 		default_price_list = frappe.get_value("Supplier", supplier, "default_price_list")
@@ -1418,16 +1420,7 @@ def make_purchase_order_for_default_supplier(source_name, selected_items=None, t
 			{
 				"Sales Order": {
 					"doctype": "Purchase Order",
-					"field_no_map": [
-						"address_display",
-						"contact_display",
-						"contact_mobile",
-						"contact_email",
-						"contact_person",
-						"taxes_and_charges",
-						"shipping_address",
-						"dispatch_address",
-					],
+					"field_no_map": [*CROSS_PARTY_FIELD_NO_MAP],
 					"validation": {"docstatus": ["=", 1]},
 				},
 				"Sales Order Item": {
@@ -1492,7 +1485,9 @@ def make_purchase_order_for_default_supplier(source_name, selected_items=None, t
 
 
 @frappe.whitelist()
-def make_purchase_order(source_name, selected_items=None, target_doc=None):
+def make_purchase_order(
+	source_name: str, selected_items: str | list | None = None, target_doc: str | Document | None = None
+):
 	if not selected_items:
 		return
 
@@ -1520,7 +1515,6 @@ def make_purchase_order(source_name, selected_items=None, target_doc=None):
 		target.shipping_rule = ""
 		target.tc_name = ""
 		target.terms = ""
-		target.payment_terms_template = ""
 		target.payment_schedule = []
 
 		if is_drop_ship_order(target):
@@ -1559,16 +1553,7 @@ def make_purchase_order(source_name, selected_items=None, target_doc=None):
 		{
 			"Sales Order": {
 				"doctype": "Purchase Order",
-				"field_no_map": [
-					"address_display",
-					"contact_display",
-					"contact_mobile",
-					"contact_email",
-					"contact_person",
-					"taxes_and_charges",
-					"shipping_address",
-					"dispatch_address",
-				],
+				"field_no_map": [*CROSS_PARTY_FIELD_NO_MAP],
 				"validation": {"docstatus": ["=", 1]},
 			},
 			"Sales Order Item": {

erpnext/selling/doctype/sales_order/test_sales_order.py

@@ -24,6 +24,8 @@ from erpnext.selling.doctype.sales_order.sales_order import (
 	create_pick_list,
 	make_delivery_note,
 	make_material_request,
+	make_purchase_order,
+	make_purchase_order_for_default_supplier,
 	make_raw_material_request,
 	make_sales_invoice,
 	make_work_orders,
@@ -1364,8 +1366,6 @@ class TestSalesOrder(AccountsTestMixin, FrappeTestCase):
 		Tests if the the Product Bundles in the Items table of Sales Orders are replaced with
 		their child items(from the Packed Items table) on creating a Purchase Order from it.
 		"""
-		from erpnext.selling.doctype.sales_order.sales_order import make_purchase_order
-
 		product_bundle = make_item("_Test Product Bundle", {"is_stock_item": 0})
 		make_item("_Test Bundle Item 1", {"is_stock_item": 1})
 		make_item("_Test Bundle Item 2", {"is_stock_item": 1})
@@ -1394,8 +1394,6 @@ class TestSalesOrder(AccountsTestMixin, FrappeTestCase):
 		"""
 		Tests if the packed item's `ordered_qty` is updated with the quantity of the Purchase Order
 		"""
-		from erpnext.selling.doctype.sales_order.sales_order import make_purchase_order
-
 		product_bundle = make_item("_Test Product Bundle", {"is_stock_item": 0})
 		make_item("_Test Bundle Item 1", {"is_stock_item": 1})
 		make_item("_Test Bundle Item 2", {"is_stock_item": 1})
@@ -2419,8 +2417,6 @@ class TestSalesOrder(AccountsTestMixin, FrappeTestCase):
 		self.assertRaises(frappe.ValidationError, so1.update_status, "Draft")
 
 	def test_item_tax_transfer_from_sales_to_purchase(self):
-		from erpnext.selling.doctype.sales_order.sales_order import make_purchase_order
-
 		item_tax = frappe.new_doc("Item Tax Template")
 		item_tax.title = "Test Item Tax Template"
 		item_tax.company = "_Test Company"
@@ -2521,6 +2517,33 @@ class TestSalesOrder(AccountsTestMixin, FrappeTestCase):
 		self.assertFalse(so.per_billed)
 		self.assertEqual(so.status, "To Deliver and Bill")
 
+	def test_make_purchase_order_does_not_inherit_party_fields(self):
+		"""
+		Customer-derived fields must not leak from a drop-ship SO into the PO.
+		"""
+		so_items = [
+			{
+				"item_code": "_Test Item",
+				"warehouse": "",
+				"qty": 1,
+				"rate": 100,
+				"delivered_by_supplier": 1,
+				"supplier": "_Test Supplier",
+			}
+		]
+		so = make_sales_order(item_list=so_items, do_not_submit=True)
+		so.tax_category = "_Test Tax Category 1"
+		so.language = "ar"
+		so.payment_terms_template = "_Test Payment Term Template"
+		so.submit()
+
+		po = make_purchase_order_for_default_supplier(so.name, selected_items=so_items)[0]
+
+		supplier = frappe.get_doc("Supplier", "_Test Supplier")
+		self.assertEqual(po.tax_category or None, supplier.tax_category or None)
+		self.assertEqual(po.language or None, supplier.language or None)
+		self.assertEqual(po.payment_terms_template or None, supplier.payment_terms or None)
+
 	def test_pending_quantity_after_update_item_during_invoice_creation(self):
 		so = make_sales_order(qty=30, rate=100)
 

erpnext/stock/doctype/delivery_note/delivery_note.py

@@ -15,7 +15,7 @@ from frappe.query_builder import DocType
 from frappe.query_builder.functions import Abs, Sum
 from frappe.utils import cint, flt
 
-from erpnext.accounts.party import get_due_date
+from erpnext.accounts.party import CROSS_PARTY_FIELD_NO_MAP, get_due_date
 from erpnext.controllers.accounts_controller import get_taxes_and_charges, merge_taxes
 from erpnext.controllers.selling_controller import SellingController
 from erpnext.stock.stock_ledger import validate_reserved_stock
@@ -1405,8 +1405,7 @@ def make_inter_company_transaction(doctype, source_name, target_doc=None):
 			doctype: {
 				"doctype": target_doctype,
 				"postprocess": update_details,
-				"field_no_map": ["taxes_and_charges", "set_warehouse"],
-				"field_map": {"shipping_address_name": "shipping_address"},
+				"field_no_map": [*CROSS_PARTY_FIELD_NO_MAP, "set_warehouse"],
 			},
 			doctype + " Item": {
 				"doctype": target_doctype + " Item",

erpnext/stock/doctype/purchase_receipt/test_purchase_receipt.py

@@ -1050,6 +1050,44 @@ class TestPurchaseReceipt(FrappeTestCase):
 
 		pr.cancel()
 
+	def test_inter_company_purchase_receipt_does_not_inherit_party_fields(self):
+		"""
+		Party-derived fields on DN (from Customer) must not leak into the mapped PR.
+		"""
+		from erpnext.stock.doctype.delivery_note.delivery_note import make_inter_company_purchase_receipt
+		from erpnext.stock.doctype.delivery_note.test_delivery_note import create_delivery_note
+
+		prepare_data_for_internal_transfer()
+
+		customer = "_Test Internal Customer 2"
+		company = "_Test Company with perpetual inventory"
+
+		stock = make_purchase_receipt(warehouse="Stores - TCP1", company=company)
+
+		dn = create_delivery_note(
+			company=company,
+			customer=customer,
+			cost_center="Main - TCP1",
+			expense_account="Cost of Goods Sold - TCP1",
+			qty=1,
+			rate=100,
+			warehouse="Stores - TCP1",
+			target_warehouse="Work In Progress - TCP1",
+			do_not_submit=True,
+		)
+		# Stamp customer-side party fields onto the DN
+		dn.tax_category = "_Test Tax Category 2"
+		dn.language = "ar"
+		dn.submit()
+
+		pr = make_inter_company_purchase_receipt(dn.name)
+
+		supplier = frappe.get_doc("Supplier", "_Test Internal Supplier 2")
+		self.assertEqual(pr.tax_category or None, supplier.tax_category or None)
+		self.assertEqual(pr.language or None, supplier.language or None)
+		dn.cancel()
+		stock.cancel()
+
 	def test_lcv_for_internal_transfer(self):
 		from erpnext.stock.doctype.delivery_note.delivery_note import make_inter_company_purchase_receipt
 		from erpnext.stock.doctype.delivery_note.test_delivery_note import create_delivery_note