CVS update: gnucash/src/engine

[Derek Atkins]

The reason I have for moving the EntityTable is that a GNCBook* has a
GUID, and GNC-Events are keyed off the creation/destruction of GUIDs
(including Books).  As events use the Entity Table, the Entity Table
should last through a session and not be tied to a specific book
(since events are also tied to a session, not specifically to a book).

Try running File -> Open Recent and open a different data file.
Notice the warning you get about id_type == NULL?  Moving the entity
table would fix that..  I think there may be another way to fix it but
I haven't looked at it too hard, yet.  I plan to look at it soon.

I may not have to move the entity table, but I'd like to.  If nothing
else I think I'd really like to restructure it from a single
GHashTable into a hash-table of hash-tables... But I dont know how
well that would work.

-derek

linas at linas.org (Linas Vepstas) writes:

> On Mon, Jun 09, 2003 at 03:14:26PM -0400, Derek Atkins was heard to remark:
> > FYI, I'm planning to move the entity table out of the book and into
> > the session...
> 
> Why?  Gut reaction is that that would be wrong: the 'session' is
> supposed to be an ephemeral thing, for hooking up the gnc-engine
> to some particular data store.  
> 
> In particular, I've tried to design things so that one book could
> sit in several sessions, so that e.g. one could implement a copy
> command, or mirroring.  Also, I'd always envisioned that if there
> was a networked gnucash, then it could work when disconnected, 
> and resync backup with the backend when the connection was
> re-established (and meanwhile save to a temp file).
> 
> If you moved the entity table to session, then you'd loose all 
> of your data if a session is torn down .... as currently happens (??)
> when you save to a different file than you used to save to ... 
> 
> 
> --linas
> 
> > > Modified Files:
> > > 	gnc-book.h gnc-book-p.h 
> > > Log Message:
> > > need to expose the entity table
> 
> -- 
> pub  1024D/01045933 2001-02-01 Linas Vepstas (Labas!) <linas at linas.org>
> PGP Key fingerprint = 8305 2521 6000 0B5E 8984  3F54 64A9 9A82 0104 5933

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available