[ZPatterns] getting multiple dataskins from a specialist at once?

[Steve Spicklemire]

Hi there..

Yes.. I do this in ZApp (http://sf.net/projects/zapp) with a customized 
specialist... You can see the code in ZApp_Specialist.py (a fairly 
simple subclass of Specialist). It builds a transaction cache of SQL 
query results that get flushed at the 'right' time. You might look at 
ZApp as a way to simplify your program logic. There are currently four 
different lever sets (Postgres, MySQL, ZODB, and Gadfly). The postgres 
levers have the most maturity at this point. I'm having a ball right 
now with ZApp and CMF since I can store all the neat stuff in postgres, 
but still have the objects show up as 'native' in the CMF. The one 
thing I haven't had much time for is documentation... alas.. I have to 
many deadlines to spend a lot of time on that.

So.. steal the code if it's helpful! ;-)

take care,
-steve

On Tuesday, June 17, 2003, at 08:11  PM, ra@burningman.com wrote:

> hi there,
>
> i've got a zpatterns application where the back-end data access is, 
> unfortunately, very slow.  currently, when i need to get a large 
> number of dataskin objects from a specialist, i have to call 
> 'getItem()' separately for each one, and this takes an unbearably long 
> time when there are more than just a few objects in my set.
>
> it's of course a simple matter to construct a query that gets all of 
> the required data all at once.  does anyone know of a way to have a 
> specialist return a large number of dataskin objects using only a 
> single query on the back end?
>
> thanks,
>
> -r
>
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