fix: fetch from parent not working for custom field

erpnext/controllers/selling_controller.py

@@ -311,6 +311,7 @@ class SellingController(StockController):
 									"sales_invoice_item": d.get("sales_invoice_item"),
 									"dn_detail": d.get("dn_detail"),
 									"incoming_rate": p.get("incoming_rate"),
+									"item_row": p,
 								}
 							)
 						)
@@ -334,6 +335,7 @@ class SellingController(StockController):
 							"sales_invoice_item": d.get("sales_invoice_item"),
 							"dn_detail": d.get("dn_detail"),
 							"incoming_rate": d.get("incoming_rate"),
+							"item_row": d,
 						}
 					)
 				)

erpnext/controllers/stock_controller.py

@@ -390,6 +390,10 @@ class StockController(AccountsController):
 		return sl_dict
 
 	def update_inventory_dimensions(self, row, sl_dict) -> None:
+		# To handle delivery note and sales invoice
+		if row.get("item_row"):
+			row = row.get("item_row")
+
 		dimensions = get_evaluated_inventory_dimension(row, sl_dict, parent_doc=self)
 		for dimension in dimensions:
 			if not dimension:
@@ -407,9 +411,17 @@ class StockController(AccountsController):
 						"DocField", {"parent": self.doctype, "options": dimension.fetch_from_parent}, "fieldname"
 					)
 
+					if not fieldname:
+						fieldname = frappe.get_cached_value(
+							"Custom Field", {"dt": self.doctype, "options": dimension.fetch_from_parent}, "fieldname"
+						)
+
 					if fieldname and self.get(fieldname):
 						sl_dict[dimension.target_fieldname] = self.get(fieldname)
 
+				if sl_dict[dimension.target_fieldname]:
+					row.set(dimension.source_fieldname, sl_dict[dimension.target_fieldname])
+
 	def make_sl_entries(self, sl_entries, allow_negative_stock=False, via_landed_cost_voucher=False):
 		from erpnext.stock.stock_ledger import make_sl_entries