Merge branch 'bugfix/childschedule' into 'dev'

Fix child schedule failing to load after del parent

See merge request crafty-controller/crafty-4!753

CHANGELOG.md

@@ -6,6 +6,7 @@
 TBD
 ### Bug fixes
 - Reset query arguments on login if `?next` is not available ([Merge Request](https://gitlab.com/crafty-controller/crafty-4/-/merge_requests/750))
+- Fix child schedule failing to load after del parent ([Merge Request](https://gitlab.com/crafty-controller/crafty-4/-/merge_requests/753))
 ### Tweaks
 - Add link to go back to dashboard on error page ([Merge Request](https://gitlab.com/crafty-controller/crafty-4/-/merge_requests/743))
 - Set audit logging to logfile instead of DB ([Merge Request](https://gitlab.com/crafty-controller/crafty-4/-/merge_requests/751))

app/classes/web/panel_handler.py

@@ -1237,9 +1237,11 @@ class PanelHandler(BaseHandler):
             page_data["schedule"]["interval_type"] = schedule.interval_type
             if schedule.interval_type == "reaction":
                 difficulty = "reaction"
-                page_data["parent"] = self.controller.management.get_scheduled_task(
-                    schedule.parent
-                )
+                page_data["parent"] = None
+                if schedule.parent:
+                    page_data["parent"] = self.controller.management.get_scheduled_task(
+                        schedule.parent
+                    )
             elif schedule.cron_string == "":
                 difficulty = "basic"
                 page_data["parent"] = None