Re: [Zope] ZCatalog and random key error

2000-11-10 Thread Erik Enge

On Fri, 10 Nov 2000, Bak @ kedai wrote:

 also, will iterating through catalog index faster than iterating through 
 ..say.. objectItems('meta-type')?

Much faster.  Much, much faster.  I tried an objectValues() on 2000 items
(in 3 different folder-type objects) and did various calculations on each
object, it took me 20 sec. to render the page.  On the same box the
Catalog return a search (much wider than the one on 2000 objects) on 15000
items (indexd, natuarally) within a second or two.

Hm.  I might be getting out on thin ice now, but I think it depends on
what you want to do with the objects you get back from your
iteration.  If you just are looking for simple attributes, the Catalog
should suffice, but it (the Catalog) might be slower if you are doing
something with the objects, since it has to fetch them first - and the
objectValues() returns the object.  I'm not sure about this, though, the
source code should help you a lot (I think objectValues() and
objectItems() and those alike are in lib/python/ObjectManager.py -
around line 350).

Come to think of it.  You did say objectItems(), and I've described the
objectValues().  I don't think you can compare the Catalog and
objectItems(), since objectItems() returns a list of (id,
subobject) tuples and thus gives you context - something the Catalog
cannot do (unless you hack it.. yeah Catalog wizards?).

I might be wrong though :)




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Re: [Zope] ZCatalog and random key error

2000-11-10 Thread Chris McDonough

You will still see random key errors until Chris Petrilli puts his ZCatalog
fixes into the 2.2 branch (hopefully 2.2.3).

- Original Message -
From: "Bak @ kedai" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, November 09, 2000 11:56 PM
Subject: [Zope] ZCatalog and random key error


 hello all
 i'm about to venture into building a ZClass that will make use of
ZCatalog.
 is it 'safe' now?  i see that my zope2.2.2 now haven't encountered any
random
 key error yet.  what about others?

 also, will iterating through catalog index faster than iterating through
 ..say.. objectItems('meta-type')?

 looking for insight, advice, holes to avoid, etc

 thanks

 --

 http://www.kedai.com.my/kk
 http://www.kedai.com.my/eZine

 use Zope?  then you got HOPE!


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