[backport] Fix a bug in audit log admin page when USE_TZ=False

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Next Release
 
+#### Fixes
+fix: Fix a bug in audit log admin page when `USE_TZ=False`. ([#511](https://github.com/jazzband/django-auditlog/pull/511))
+
 ## 2.2.2 (2023-01-16)
 
 #### Fixes

auditlog/mixins.py

@@ -8,7 +8,7 @@ from django.forms.utils import pretty_name
 from django.urls.exceptions import NoReverseMatch
 from django.utils.html import format_html, format_html_join
 from django.utils.safestring import mark_safe
-from django.utils.timezone import localtime
+from django.utils.timezone import is_aware, localtime
 
 from auditlog.models import LogEntry
 from auditlog.registry import auditlog
@@ -20,7 +20,9 @@ MAX = 75
 class LogEntryAdminMixin:
     @admin.display(description="Created")
     def created(self, obj):
-        return localtime(obj.timestamp)
+        if is_aware(obj.timestamp):
+            return localtime(obj.timestamp)
+        return obj.timestamp
 
     @admin.display(description="User")
     def user_url(self, obj):

auditlog_tests/tests.py

@@ -1314,6 +1314,17 @@ class AdminPanelTest(TestCase):
                 created = self.admin.created(log_entry)
                 self.assertEqual(created.strftime("%Y-%m-%d %H:%M:%S"), timestamp)
 
+    @freezegun.freeze_time("2022-08-01 12:00:00Z")
+    def test_created_naive_datetime(self):
+        with self.settings(USE_TZ=False):
+            obj = SimpleModel.objects.create(text="For USE_TZ=False test")
+            log_entry = obj.history.latest()
+            created = self.admin.created(log_entry)
+            self.assertEqual(
+                created.strftime("%Y-%m-%d %H:%M:%S"),
+                "2022-08-01 12:00:00",
+            )
+
 
 class DiffMsgTest(TestCase):
     def setUp(self):