(bugfix) Adds hasattr check before threadlocal.auditlog access in set…

…_actor

middleware.set_actor was inconsistent with other methods in checking for
hasattr(threadlocal, 'auditlog')

src/auditlog/middleware.py

@@ -70,14 +70,15 @@ def set_actor(user, sender, instance, signal_duid, **kwargs):
         Signal receiver with an extra, required 'user' kwarg. This method becomes a real (valid) signal receiver when
         it is curried with the actor.
         """
-        if signal_duid != threadlocal.auditlog['signal_duid']:
-            return
-        try:
-            app_label, model_name = settings.AUTH_USER_MODEL.split('.')
-            auth_user_model = apps.get_model(app_label, model_name)
-        except ValueError:
-            auth_user_model = apps.get_model('auth', 'user')
-        if sender == LogEntry and isinstance(user, auth_user_model) and instance.actor is None:
-            instance.actor = user
         if hasattr(threadlocal, 'auditlog'):
+            if signal_duid != threadlocal.auditlog['signal_duid']:
+                return
+            try:
+                app_label, model_name = settings.AUTH_USER_MODEL.split('.')
+                auth_user_model = apps.get_model(app_label, model_name)
+            except ValueError:
+                auth_user_model = apps.get_model('auth', 'user')
+            if sender == LogEntry and isinstance(user, auth_user_model) and instance.actor is None:
+                instance.actor = user
+
             instance.remote_addr = threadlocal.auditlog['remote_addr']