Fixed #30876 -- Moved classproperty() decorator to the django.utils.functional.

django/db/migrations/recorder.py

@@ -1,7 +1,7 @@
 from django.apps.registry import Apps
 from django.db import models
 from django.db.utils import DatabaseError
-from django.utils.decorators import classproperty
+from django.utils.functional import classproperty
 from django.utils.timezone import now
 
 from .exceptions import MigrationSchemaMissing

django/test/selenium.py

@@ -3,7 +3,7 @@ import unittest
 from contextlib import contextmanager
 
 from django.test import LiveServerTestCase, tag
-from django.utils.decorators import classproperty
+from django.utils.functional import classproperty
 from django.utils.module_loading import import_string
 from django.utils.text import capfirst
 

django/test/testcases.py

@@ -37,7 +37,7 @@ from django.test.utils import (
     CaptureQueriesContext, ContextList, compare_xml, modify_settings,
     override_settings,
 )
-from django.utils.decorators import classproperty
+from django.utils.functional import classproperty
 from django.views.static import serve
 
 __all__ = ('TestCase', 'TransactionTestCase',

django/utils/decorators.py

@@ -150,15 +150,3 @@ def make_middleware_decorator(middleware_class):
             return _wrapped_view
         return _decorator
     return _make_decorator
-
-
-class classproperty:
-    def __init__(self, method=None):
-        self.fget = method
-
-    def __get__(self, instance, cls=None):
-        return self.fget(cls)
-
-    def getter(self, method):
-        self.fget = method
-        return self

django/utils/functional.py

@@ -49,6 +49,18 @@ class cached_property:
         return res
 
 
+class classproperty:
+    def __init__(self, method=None):
+        self.fget = method
+
+    def __get__(self, instance, cls=None):
+        return self.fget(cls)
+
+    def getter(self, method):
+        self.fget = method
+        return self
+
+
 class Promise:
     """
     Base class for the proxy class created in the closure of the lazy function.

docs/releases/3.1.txt

@@ -263,6 +263,9 @@ Miscellaneous
   ``ETag`` header to responses with an empty
   :attr:`~django.http.HttpResponse.content`.
 
+* ``django.utils.decorators.classproperty()`` decorator is moved to
+  ``django.utils.functional.classproperty()``.
+
 .. _deprecated-features-3.1:
 
 Features deprecated in 3.1

tests/utils_tests/test_decorators.py

@@ -2,7 +2,7 @@ from django.http import HttpResponse
 from django.template import engines
 from django.template.response import TemplateResponse
 from django.test import RequestFactory, SimpleTestCase
-from django.utils.decorators import classproperty, decorator_from_middleware
+from django.utils.decorators import decorator_from_middleware
 
 
 class ProcessViewMiddleware:
@@ -108,41 +108,3 @@ class DecoratorFromMiddlewareTests(SimpleTestCase):
         self.assertTrue(getattr(request, 'process_response_reached', False))
         # process_response saw the rendered content
         self.assertEqual(request.process_response_content, b"Hello world")
-
-
-class ClassPropertyTest(SimpleTestCase):
-    def test_getter(self):
-        class Foo:
-            foo_attr = 123
-
-            def __init__(self):
-                self.foo_attr = 456
-
-            @classproperty
-            def foo(cls):
-                return cls.foo_attr
-
-        class Bar:
-            bar = classproperty()
-
-            @bar.getter
-            def bar(cls):
-                return 123
-
-        self.assertEqual(Foo.foo, 123)
-        self.assertEqual(Foo().foo, 123)
-        self.assertEqual(Bar.bar, 123)
-        self.assertEqual(Bar().bar, 123)
-
-    def test_override_getter(self):
-        class Foo:
-            @classproperty
-            def foo(cls):
-                return 123
-
-            @foo.getter
-            def foo(cls):
-                return 456
-
-        self.assertEqual(Foo.foo, 456)
-        self.assertEqual(Foo().foo, 456)

tests/utils_tests/test_functional.py

@@ -1,7 +1,7 @@
 from unittest import mock
 
 from django.test import SimpleTestCase
-from django.utils.functional import cached_property, lazy
+from django.utils.functional import cached_property, classproperty, lazy
 
 
 class FunctionalTests(SimpleTestCase):
@@ -218,3 +218,39 @@ class FunctionalTests(SimpleTestCase):
         with mock.patch.object(__proxy__, '__prepare_class__') as mocked:
             lazified()
             mocked.assert_not_called()
+
+    def test_classproperty_getter(self):
+        class Foo:
+            foo_attr = 123
+
+            def __init__(self):
+                self.foo_attr = 456
+
+            @classproperty
+            def foo(cls):
+                return cls.foo_attr
+
+        class Bar:
+            bar = classproperty()
+
+            @bar.getter
+            def bar(cls):
+                return 123
+
+        self.assertEqual(Foo.foo, 123)
+        self.assertEqual(Foo().foo, 123)
+        self.assertEqual(Bar.bar, 123)
+        self.assertEqual(Bar().bar, 123)
+
+    def test_classproperty_override_getter(self):
+        class Foo:
+            @classproperty
+            def foo(cls):
+                return 123
+
+            @foo.getter
+            def foo(cls):
+                return 456
+
+        self.assertEqual(Foo.foo, 456)
+        self.assertEqual(Foo().foo, 456)