[Kde-pim] Data loss: kmail2 must not use existing [Folder-xy] settings on random new folders

[Kevin Krammer]

On Monday, 2011-12-12, Sven Burmeister wrote:
> Hello everyone!
> 
> What just happened to me.
> 
> I removed a kmail-folders resource pointing to ~/Mail and added a maildir-
> resource pointing to ~/Mail.
> 
> I did this via systemsettings i.e. kmail was closed.
> 
> When I restarted kmail and refreshed the folders I suddenly saw that kmail
> had deleted ~6000 mails off my sent folder which was part of that new
> resource.
> 
> I had not set any expiration settings for tha folder, neither when it was
> accessed via the kmail-folders resource nor the maildir resource.
> 
> Having a look at kmail2rc I see that it contains lots of [Folder-xy]
> including expiration settings.
> 
> So my guess and this happens with filters as well, is that kmail just
> assigns a new number to the new folders of the new resource and keeps the
> settings if that number already existed.
> 
> This must never ever happen!

Absolutely!

And it should not have happend. The database should not have given out the 
same id twice.
Could it be that MySQL now requires a new setting to not reuse unique ids?

Cheers,
Kevin
-- 
Kevin Krammer, KDE developer, xdg-utils developer
KDE user support, developer mentoring
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