Fixed #36702 -- Made bulk_create() return pk values set by an expression.

django/db/models/query.py

@@ -842,7 +842,6 @@ class QuerySet(AltersData):
                 )
                 for obj_with_pk, results in zip(objs_with_pk, returned_columns):
                     for result, field in zip(results, opts.db_returning_fields):
-                        if field != opts.pk:
                         setattr(obj_with_pk, field.attname, result)
                 for obj_with_pk in objs_with_pk:
                     obj_with_pk._state.adding = False

tests/bulk_create/tests.py

@@ -884,6 +884,15 @@ class BulkCreateTests(TestCase):
         (obj,) = DbDefaultPrimaryKey.objects.bulk_create([DbDefaultPrimaryKey()])
         self.assertIsInstance(obj.id, datetime)
 
+    @skipUnlessDBFeature(
+        "can_return_rows_from_bulk_insert", "supports_expression_defaults"
+    )
+    def test_db_expression_primary_key(self):
+        (obj,) = DbDefaultPrimaryKey.objects.bulk_create(
+            [DbDefaultPrimaryKey(id=Now())]
+        )
+        self.assertIsInstance(obj.id, datetime)
+
 
 @skipUnlessDBFeature("supports_transactions", "has_bulk_insert")
 class BulkCreateTransactionTests(TransactionTestCase):