If all keywords in an event are removed, no django signal and hence no n_events_changed=True is triggered

[Rikuoja]

This is most likely related to Django limitation documented in https://code.djangoproject.com/ticket/6707#comment:37 . Addressing this issue would require creating a model and custom save method for the through table.

Not to be considered a priority, as removing all keywords through the API should be rare, and event numbers will be updated accordingly when each keyword is added the next time.

[Rikuoja]

post_clear signal is not triggered, so no help there.

[akx]

Isn't this superseded by #198/#200?

[Rikuoja]

Sadly not :/ This is a corner case that is not caught by https://github.com/City-of-Helsinki/linkedevents/blob/master/events/models.py#L501 , and post_clear doesn't trigger so useless to add it there.