Refs #33216 -- Made @deconstructible do not change path for subclasses.

django/utils/deconstruct.py

@@ -23,7 +23,7 @@ def deconstructible(*args, path=None):
             and keyword arguments.
             """
             # Fallback version
-            if path:
+            if path and type(obj) is klass:
                 module_name, _, name = path.rpartition('.')
             else:
                 module_name = obj.__module__
@@ -40,7 +40,9 @@ def deconstructible(*args, path=None):
                     "https://docs.djangoproject.com/en/%s/topics/migrations/#serializing-values"
                     % (name, module_name, get_docs_version()))
             return (
-                path or '%s.%s' % (obj.__class__.__module__, name),
+                path
+                if path and type(obj) is klass
+                else f'{obj.__class__.__module__}.{name}',
                 obj._constructor_args[0],
                 obj._constructor_args[1],
             )

tests/utils_tests/test_deconstruct.py

@@ -19,6 +19,10 @@ class DeconstructibleWithPathClass:
     pass
 
 
+class DeconstructibleWithPathChildClass(DeconstructibleWithPathClass):
+    pass
+
+
 @deconstructible(
     path='utils_tests.deconstructible_classes.DeconstructibleInvalidPathClass',
 )
@@ -26,6 +30,10 @@ class DeconstructibleInvalidPathClass:
     pass
 
 
+class DeconstructibleInvalidPathChildClass(DeconstructibleInvalidPathClass):
+    pass
+
+
 class DeconstructibleTests(SimpleTestCase):
     def test_deconstruct(self):
         obj = DeconstructibleClass('arg', key='value')
@@ -51,6 +59,16 @@ class DeconstructibleTests(SimpleTestCase):
         self.assertEqual(args, ('arg',))
         self.assertEqual(kwargs, {'key': 'value'})
 
+    def test_deconstruct_child_with_path(self):
+        obj = DeconstructibleWithPathChildClass('arg', key='value')
+        path, args, kwargs = obj.deconstruct()
+        self.assertEqual(
+            path,
+            'utils_tests.test_deconstruct.DeconstructibleWithPathChildClass',
+        )
+        self.assertEqual(args, ('arg',))
+        self.assertEqual(kwargs, {'key': 'value'})
+
     def test_invalid_path(self):
         obj = DeconstructibleInvalidPathClass()
         docs_version = get_docs_version()
@@ -66,3 +84,13 @@ class DeconstructibleTests(SimpleTestCase):
         )
         with self.assertRaisesMessage(ValueError, msg):
             obj.deconstruct()
+
+    def test_parent_invalid_path(self):
+        obj = DeconstructibleInvalidPathChildClass('arg', key='value')
+        path, args, kwargs = obj.deconstruct()
+        self.assertEqual(
+            path,
+            'utils_tests.test_deconstruct.DeconstructibleInvalidPathChildClass',
+        )
+        self.assertEqual(args, ('arg',))
+        self.assertEqual(kwargs, {'key': 'value'})