Don't update recent documents for anonymous users

apps/documents/managers.py

@@ -11,15 +11,16 @@ from .conf.settings import RECENT_COUNT
 
 class RecentDocumentManager(models.Manager):
     def add_document_for_user(self, user, document):
-        self.model.objects.filter(user=user, document=document).delete()
-        new_recent = self.model(user=user, document=document, datetime_accessed=datetime.now())
-        new_recent.save()
-        to_delete = self.model.objects.filter(user=user)[RECENT_COUNT:]
-        for recent_to_delete in to_delete:
-            recent_to_delete.delete()
+        if user.is_authenticated():
+            self.model.objects.filter(user=user, document=document).delete()
+            new_recent = self.model(user=user, document=document, datetime_accessed=datetime.now())
+            new_recent.save()
+            to_delete = self.model.objects.filter(user=user)[RECENT_COUNT:]
+            for recent_to_delete in to_delete:
+                recent_to_delete.delete()
             
     def get_for_user(self, user):
-        if not user.is_anonymous():
+        if user.is_authenticated():
             return [recent_document.document for recent_document in self.model.objects.filter(user=user)]
         else:
             return []