Deleting a "Notification Group" causes Server Error "NotificationGroup matching query does not exist" in the Event Rule edit view

[joernheissler]

Deployment Type

Self-hosted

NetBox Version

v4.3.2

Python Version

3.11

Steps to Reproduce

1. Navigate to Operations/Notification Groups
2. Add a new notification group:
   • Name "foo"
   • select your user as target
   • (details probably don't matter here)
3. Navigate to Operations/Event Rules
4. Add a new event rule:
   • Name "bar"
   • Object types: Circuits > Circuit
   • Event types: Object created
   • Action type: Notification
   • Notification group: foo
5. Navigate to Operations/Notification Groups
6. Delete the "foo" group. Confirm the deletion.
7. Navigate to Operations/Event Rules
8. Click the small "edit" button of the "bar" event rule.

Expected Behavior

When deleting the notification group, I expect NetBox to ask me about deleting the event rule(s) which use this notification group. When deleting a referenced web hook, NetBox does ask about deleting the event rules.

I expected NetBox to not show me a "Server Error" (see "Observed Behavior").

Observed Behavior

When I delete the event group (step 6) netbox:

Delete notification group?

Confirm Deletion

Are you sure you want to delete foo?

[Cancel] [Delete]

When visiting https://netbox-stg.example.net/extras/event-rules/4/edit/?return_url=/extras/event-rules/ (step 8) I get:

Server Error

There was a problem with your request. Please contact an administrator.

The complete exception is provided below:

<class 'extras.models.notifications.NotificationGroup.DoesNotExist'>

NotificationGroup matching query does not exist.

Python version: 3.11.2
NetBox version: 4.3.2
Plugins:
netbox_reorder_rack: 1.1.3

If further assistance is required, please post to the NetBox discussion forum on GitHub.

The broken event rule can be deleted, so no manual edits of the database are required.

[jnovinger]

Thanks for the detailed report, @joernheissler !