fix: Supplier users not able to see RFQ on the Portal (#40161)

erpnext/buying/doctype/request_for_quotation/request_for_quotation.py

@@ -206,10 +206,30 @@ class RequestforQuotation(BuyingController):
 
 		contact.save(ignore_permissions=True)
 
+		if rfq_supplier.supplier:
+			self.update_user_in_supplier(rfq_supplier.supplier, user.name)
+
 		if not rfq_supplier.contact:
 			# return contact to later update, RFQ supplier row's contact
 			return contact.name
 
+	def update_user_in_supplier(self, supplier, user):
+		"""Update user in Supplier."""
+		if not frappe.db.exists("Portal User", {"parent": supplier, "user": user}):
+			supplier_doc = frappe.get_doc("Supplier", supplier)
+			supplier_doc.append(
+				"portal_users",
+				{
+					"user": user,
+				},
+			)
+
+			supplier_doc.flags.ignore_validate = True
+			supplier_doc.flags.ignore_mandatory = True
+			supplier_doc.flags.ignore_permissions = True
+
+			supplier_doc.save()
+
 	def create_user(self, rfq_supplier, link):
 		user = frappe.get_doc(
 			{

erpnext/buying/doctype/request_for_quotation/test_request_for_quotation.py

@@ -149,6 +149,33 @@ class TestRequestforQuotation(FrappeTestCase):
 		get_pdf(rfq.name, rfq.get("suppliers")[0].supplier)
 		self.assertEqual(frappe.local.response.type, "pdf")
 
+	def test_portal_user_with_new_supplier(self):
+		supplier_doc = frappe.get_doc(
+			{
+				"doctype": "Supplier",
+				"supplier_name": "Test Supplier for RFQ",
+				"supplier_group": "_Test Supplier Group",
+			}
+		).insert()
+
+		self.assertFalse(supplier_doc.portal_users)
+
+		rfq = make_request_for_quotation(
+			supplier_data=[
+				{
+					"supplier": supplier_doc.name,
+					"supplier_name": supplier_doc.supplier_name,
+					"email_id": "123_testrfquser@example.com",
+				}
+			],
+			do_not_submit=True,
+		)
+		for rfq_supplier in rfq.suppliers:
+			rfq.update_supplier_contact(rfq_supplier, rfq.get_link())
+
+		supplier_doc.reload()
+		self.assertTrue(supplier_doc.portal_users[0].user)
+
 
 def make_request_for_quotation(**args) -> "RequestforQuotation":
 	"""