Bug 666329 should block release of 2.4.9

Derek Atkins derek at ihtfp.com
Mon Jan 2 19:53:20 EST 2012


Why is the autosave even kicking in with a SQL backend?  There's no need
for it.  If we're using SQL, autosave should not even run.


On Mon, January 2, 2012 7:15 pm, John Ralls wrote:
> I think I've figured out the root cause of 666329 [1]. There are three
> components:
> * The autosave timer can fire while the user is in the middle of an edit
> (meaning that the objects in memory may not be in a clean state suitable
> for being saved).
> * The SQL backend is set up to check for, and disallow saving of, tuples
> where one or more fields is NULL. In the case at hand, it's a taxtable
> entry with no account guid.
> * The SQL backend takes a meat-axe approach to "synching", dropping all of
> the tables in the database, re-creating them, and saving all of the
> objects in memory to the new tables.
> I see several fixes here. The quickest is to replace gnc_dbi_sync_all()
> with gnc_dbi_safe_save() as what's called by be->sync. That will at least
> prevent data loss. Also, I think that the autosave function should be
> moved out of gnome-utils into backend/xml, since it isn't really
> appropriate for the SQL backends which are supposed to save everything as
> part of a commitEdit.
> However, it's bad to be doing a save when the user is in the middle of an
> edit for any backend, so there should also be an edit lock to prevent the
> save if anything has an open edit. The autosave should fire when the edit
> is committed or aborted. That's going to take rather more extensive
> architectural changes.
> I propose that we should hold off releasing 2.4.9 until I can do the first
> two (i.e., save_save and moving autosave).
> As an aside the user says that he doesn't see the problem on 2.4.7, but I
> can't see any commits between 2.4.7 and 2.4.8 that would have anything to
> do with this. Does anyone else?
> Regards,
> John Ralls
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       Derek Atkins                 617-623-3745
       derek at ihtfp.com             www.ihtfp.com
       Computer and Internet Security Consultant

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