Refs #28586 - Copied fetch mode in QuerySet.create().

adamchainz · jacobtylerwalls · commit e244d8bbb743 · 2025-10-16T14:52:22.000-04:00
This change allows the pattern `MyModel.objects.fetch_mode(...).create(...)` to
set the fetch mode for a new object.
diff --git a/django/db/models/query.py b/django/db/models/query.py
@@ -683,6 +683,7 @@ def create(self, **kwargs):
         obj = self.model(**kwargs)
         self._for_write = True
         obj.save(force_insert=True, using=self.db)
+        obj._state.fetch_mode = self._fetch_mode
         return obj
 
     create.alters_data = True
diff --git a/tests/basic/tests.py b/tests/basic/tests.py
@@ -290,6 +290,13 @@ def test_create_method(self):
         )
         self.assertEqual(Article.objects.get(headline="Article 10"), a10)
 
+    def test_create_method_propagates_fetch_mode(self):
+        article = Article.objects.fetch_mode(models.FETCH_PEERS).create(
+            headline="Article 10",
+            pub_date=datetime(2005, 7, 31, 12, 30, 45),
+        )
+        self.assertEqual(article._state.fetch_mode, models.FETCH_PEERS)
+
     def test_year_lookup_edge_case(self):
         # Edge-case test: A year lookup should retrieve all objects in
         # the given year, including Jan. 1 and Dec. 31.
