Icaro Motta 999d8c0ee0
Support soft deletion for activity center notifications (#3201)
Adds a new column named `deleted` to the table `activity_center_notifications`. 

Related PR in Mobile https://github.com/status-im/status-mobile/pull/15106 for a lot more details of the feature.

Why? Relying on the `dismissed` column for soft deletion is no longer viable because the mobile & desktop clients should display dismissed notifications (sometimes), hence the need for a new column to truly represent soft deletion.
2023-02-24 20:47:04 -03:00
..
2020-04-16 15:51:28 +02:00
2021-01-08 08:43:16 +01:00

How to write migrations?

We only write up migrations, down migrations are not always possible in sqlite or too complex/too expensive. For example to remove a column you would have to duplicate the table, copy over the data, delete and recreated. This can be very expensive for some tables (user_messages for example), so should not be attempted.

Notes

One issue we faced multiple times is that updates to user_messages can be very expensive, leading to slow upgrade times and interrupted migrations. So avoid writes if not necessary.