Fixed #32812 -- Restored immutability of named values from QuerySet.values_list().

Regression in 981a072dd4dec586f8fc606712ed9a2ef116eeee.

Thanks pirelle for the report.

3 files changed, 17 insertions, 0 deletions

diff --git a/tests/model_utils/__init__.py b/tests/model_utils/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/tests/model_utils/__init__.py
diff --git a/tests/model_utils/tests.py b/tests/model_utils/tests.py
new file mode 100644
index 0000000000..be4dd4300b
--- /dev/null
+++ b/tests/model_utils/tests.py
@@ -0,0 +1,10 @@
+from django.db.models.utils import create_namedtuple_class
+from django.test import SimpleTestCase
+
+
+class NamedTupleClassTests(SimpleTestCase):
+    def test_immutability(self):
+        row_class = create_namedtuple_class('field1', 'field2')
+        row = row_class('value1', 'value2')
+        with self.assertRaises(AttributeError):
+            row.field3 = 'value3'
diff --git a/tests/prefetch_related/tests.py b/tests/prefetch_related/tests.py
index e21bd5ec23..cba1897fc5 100644
--- a/tests/prefetch_related/tests.py
+++ b/tests/prefetch_related/tests.py
@@ -309,6 +309,13 @@ class PrefetchRelatedTests(TestDataMixin, TestCase):
                     list(Book.objects.prefetch_related(relation))
                     self.assertEqual(add_q_mock.call_count, 1)
 
+    def test_named_values_list(self):
+        qs = Author.objects.prefetch_related('books')
+        self.assertCountEqual(
+            [value.name for value in qs.values_list('name', named=True)],
+            ['Anne', 'Charlotte', 'Emily', 'Jane'],
+        )
+
 
 class RawQuerySetTests(TestDataMixin, TestCase):
     def test_basic(self):