Fixed #35667 -- Improved deprecation warning handling by replacing stacklevel with skip_file_prefixes.

Signed-off-by: saJaeHyukc <wogur981208@gmail.com>

django/utils/deprecation.py

@@ -1,8 +1,12 @@
 import inspect
+import os
 import warnings
 
 from asgiref.sync import iscoroutinefunction, markcoroutinefunction, sync_to_async
 
+import django
+from django.utils.version import PY312
+
 
 class RemovedInDjango60Warning(DeprecationWarning):
     pass
@@ -140,3 +144,25 @@ class MiddlewareMixin:
                 thread_sensitive=True,
             )(request, response)
         return response
+
+
+def adjust_stacklevel_for_warning(skip_file_prefixes):
+    def _get_non_django_stacklevel():
+        django_path = os.path.dirname(django.__file__)
+        stacklevel = 1
+        # Exclude current and nested function frames with [2:].
+        for frame_info in inspect.stack()[2:]:
+            filename = os.path.abspath(frame_info.filename)
+            if not filename.startswith(django_path):
+                return stacklevel
+            stacklevel += 1
+        return 1
+
+    if PY312:
+        return {
+            "skip_file_prefixes": (
+                os.path.normpath(os.path.dirname(skip_file_prefixes)),
+            )
+        }
+    else:
+        return {"stacklevel": _get_non_django_stacklevel()}

docs/internals/contributing/writing-code/submitting-patches.txt

@@ -221,7 +221,10 @@ previous behavior, or standalone items that are unnecessary or unused when the
 deprecation ends. For example::
 
     import warnings
-    from django.utils.deprecation import RemovedInDjangoXXWarning
+    from django.utils.deprecation import (
+        RemovedInDjangoXXWarning,
+        adjust_stacklevel_for_warning,
+    )
 
 
     # RemovedInDjangoXXWarning.
@@ -234,7 +237,7 @@ deprecation ends. For example::
         warnings.warn(
             "foo() is deprecated.",
             category=RemovedInDjangoXXWarning,
-            stacklevel=2,
+            **adjust_stacklevel_for_warning(__file__),
         )
         old_private_helper()
         ...

tests/deprecation/tests.py

@@ -1,5 +1,9 @@
+import importlib.util
+import os
 import warnings
+from pathlib import Path
 
+import django
 from django.test import SimpleTestCase
 from django.utils.deprecation import RemovedAfterNextVersionWarning, RenameMethodsBase
 
@@ -178,3 +182,37 @@ class RenameMethodsTests(SimpleTestCase):
         self.assertTrue(
             issubclass(RemovedAfterNextVersionWarning, PendingDeprecationWarning)
         )
+
+
+class AdjustStacklevelForWarningTests(SimpleTestCase):
+    def test_warning_in_django_code(self):
+        self.django_path = Path(os.path.dirname(django.__file__))
+        self.temp_file_path = self.django_path / "temp_adjust_stacklevel_for_warning.py"
+
+        file_content = """
+import warnings
+from django.utils.deprecation import adjust_stacklevel_for_warning
+
+def django_function():
+    warnings.warn(
+        "This is a test warning from Django code.",
+        DeprecationWarning,
+        **adjust_stacklevel_for_warning(__file__),
+    )
+        """
+        self.temp_file_path.write_text(file_content)
+
+        module_name = "temp_adjust_stacklevel_for_warning"
+        spec = importlib.util.spec_from_file_location(
+            module_name, str(self.temp_file_path)
+        )
+        module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(module)
+
+        msg = "This is a test warning from Django code."
+        with self.assertWarnsMessage(DeprecationWarning, msg) as ctx:
+            module.django_function()
+
+        self.assertEqual(ctx.filename, __file__)
+
+        self.temp_file_path.unlink()