Check that starting and ending times are not None

Closes #1174.
apluslms · May 30, 2023 · 4db0acb · 4db0acb
1 parent 2d74071
commit 4db0acb
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/course/models.py b/course/models.py
@@ -707,7 +707,7 @@ def clean(self):
             errors['instance_name'] = format_lazy(_('COURSE_INSTANCE_ERROR_INSTANCE_NAME -- {}'), self.instance_name)
         if self.url in RESERVED:
             errors['url'] = format_lazy(_('COURSE_INSTANCE_ERROR_URL -- {}'), self.url)
-        if self.ending_time <= self.starting_time:
+        if self.ending_time and self.starting_time and self.ending_time <= self.starting_time:
             errors['ending_time'] = _('COURSE_INSTANCE_ERROR_ENDING_TIME_BEFORE_STARTING')
         if self.lifesupport_time and self.lifesupport_time < self.ending_time:
             errors['lifesupport_time'] = _('COURSE_INSTANCE_ERROR_LIFESUPPORT_TIME_BEFORE_ENDING')