Merge pull request #28012 from frappe/mergify/bp/version-13-hotfix/pr-27904

fix: map missing fields in opportunity (backport #27904)

erpnext/crm/doctype/opportunity/opportunity.py

@@ -34,6 +34,7 @@ class Opportunity(TransactionBase):
 		self.validate_item_details()
 		self.validate_uom_is_integer("uom", "qty")
 		self.validate_cust_name()
+		self.map_fields()
 
 		if not self.title:
 			self.title = self.customer_name
@@ -41,6 +42,15 @@ class Opportunity(TransactionBase):
 		if not self.with_items:
 			self.items = []
 
+	def map_fields(self):
+		for field in self.meta.fields:
+			if not self.get(field.fieldname):
+				try:
+					value = frappe.db.get_value(self.opportunity_from, self.party_name, field.fieldname)
+					frappe.db.set(self, field.fieldname, value)
+				except Exception:
+					continue
+
 	def make_new_lead_if_required(self):
 		"""Set lead against new opportunity"""
 		if (not self.get("party_name")) and self.contact_email: