'DC' used to be an option for 'tag' -- disappeared from list?

[maneesha]

See:

[aditnryn]

For what it's worth,
The DC tag could have been deleted.
New tags can be added through the admin interface.
/workshops/admin/workshops/tag/add/ URL adds a new tag.

[gvwilson]

Deleted by whom??

[aditnryn]

Accidentally deleted from the admin interface by an admin user? That was just a hypothesis.
I cannot think of any other way a tag can be deleted.

@pbanaszkiewicz would answer it better than me.

[maneesha]

Deleted by whom??

That's why I raised this issue. I know it's easy to add a tag but it's a problem that it got deleted. I've never gone into the admin panel.

[pbanaszkiewicz]

Looking into this issue…

[gvwilson]

Thanks Piotr.

[pbanaszkiewicz]

Logs don't show anyone accessing the admin interface in order to remove the tag, which means there's some awful bug in the code that removed the tag.

I'll:

1. bisect the backups to find correct time the removal happened and then check what requests caused it
2. retrieve lost data
3. review our models' on_delete behavior.

It may take me some hours before I'll retrieve the lost data (ie. workshops that were marked DC).

[pbanaszkiewicz]

@maneesha thank you for reacting this quick, by the way. The lost happened probably in the last 24h.

[pbanaszkiewicz]

Found the error. It's in the event merge procedure and you can reproduce it by setting base object for merge to object A (ie. Field to "Use A"), and strategy for tags to "Use B".

EDIT: not sure though how it behaves when both events have different tags; I only tested it for "DC" "DC".

[gvwilson]

Excellent sleuthing - http://www.amazon.com/Heart-Logs-Stream-Processing-Integration/dp/1491909382/ for the win. Please write this one up (both the bug and how you found it) when you're done, and bill us for every minute you spend on it. Thanks, Greg

[pbanaszkiewicz]

The data was retrieved.

@gvwilson write up and publish somewhere?

[gvwilson]

Excellent work.

[pbanaszkiewicz]

Excellent work.

And terrible too, because the bug is in code I wrote :-)

[pbanaszkiewicz]

Forgot to close this issue yesterday :-)