[FR]: Add support for loading newer-than-current databases (with warning)

[ljgdasfhk]

Brief Description

OS: Windows 11
qTox version: v1.18.0-rc.1
Commit hash:
toxcore:
Qt:
…

Reproducible: Always

Steps to reproduce

1. start qTox from Start menu icon

qtox.log

[iphydf]

It seems you've been using qTox_enhanced. I don't know what additional changes have been made there in the versions after 11.

You could try forcefully downgrading your database (after making a backup) by opening it with a sqlcipher command line client and running the query PRAGMA user_version = 11;. Hopefully nothing changed incompatibly and we can just read the data then.

This does make me think that we should have a more client-neutral way of doing data exports and imports so we can have long term stable backup formats. I'll file a feature request for that.

[iphydf]

We could add something to qtox to allow a user to override this refusal to load, and load the DB anyway. Doing so will probably make the DB incompatible with the higher version client (e.g. qtox_enhanced), so the user should make a backup in any case, but at least we're probably able to move forward with that DB.

[Darthagnon]

I've noticed the same issue, and have been using qTox_enhanced myself.

but after complaining, it then proceeded to load the profile successfully :/

I made no changes, sent no messages, may have received some acknowledgements or offline/online ping messages in qTox v1.18. I then closed it, and everything still loads fine in qTox_enhanced.