Fix serialize __proxy__ objects before logging

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changes
 
 ## Next Release
+- Fixed logging problem related to django translation before logging ([#624](https://github.com/jazzband/django-auditlog/pull/624))
 
 ## 3.0.0-beta.4 (2024-01-02)
 

auditlog/diff.py

@@ -82,6 +82,8 @@ def get_field_value(obj, field):
             )
         else:
             value = smart_str(getattr(obj, field.name, None))
+            if type(value).__name__ == "__proxy__":
+                value = str(value)
     except ObjectDoesNotExist:
         value = (
             field.default

auditlog_tests/models.py

@@ -24,7 +24,7 @@ class SimpleModel(models.Model):
     history = AuditlogHistoryField(delete_related=True)
 
     def __str__(self):
-        return self.text
+        return str(self.text)
 
 
 class AltPrimaryKeyModel(models.Model):

auditlog_tests/tests.py

@@ -23,6 +23,7 @@ from django.urls import resolve, reverse
 from django.utils import dateformat, formats
 from django.utils import timezone as django_timezone
 from django.utils.encoding import smart_str
+from django.utils.translation import gettext_lazy as _
 
 from auditlog.admin import LogEntryAdmin
 from auditlog.cid import get_cid
@@ -1641,6 +1642,18 @@ class DiffMsgTest(TestCase):
             ),
         )
 
+    def test_instance_translation_and_history_logging(self):
+        first = SimpleModel()
+        second = SimpleModel(text=_("test"))
+        changes = model_instance_diff(first, second)
+        self.assertEqual(
+            changes,
+            {'text': ('', 'test')}
+        )
+        second.save()
+        log_one = second.history.last()
+        self.assertTrue(isinstance(log_one, LogEntry))
+
     def test_changes_msg_create(self):
         log_entry = self._create_log_entry(
             LogEntry.Action.CREATE,