From 61416205a8edb22ddf3812de9644c92a2c74551e Mon Sep 17 00:00:00 2001
From: Jacob Pierce <w.jacobpierce@gmail.com>
Date: Wed, 3 Jul 2024 15:05:12 -0700
Subject: [PATCH] update sorting lambda to account for possible None value

---
 kolibri/core/exams/api.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kolibri/core/exams/api.py b/kolibri/core/exams/api.py
index 7ca4c7c89d..5c202d8538 100644
--- a/kolibri/core/exams/api.py
+++ b/kolibri/core/exams/api.py
@@ -1,3 +1,5 @@
+import datetime
+
 from django.http import Http404
 from django.utils.timezone import now
 from django_filters.rest_framework import DjangoFilterBackend
@@ -152,9 +154,10 @@ def list(self, request, *args, **kwargs):
 
         # Consolidate the exam_queryset and draft_queryset
         # and sort them by reverse date_created
+        dt_utc_aware = datetime.datetime.fromtimestamp(0, datetime.timezone.utc)
         all_objects = sorted(
             [*exam_objects, *draft_objects],
-            key=lambda x: x["date_created"],
+            key=lambda x: x["date_created"] or dt_utc_aware,
             reverse=True,
         )