Re: Deep hierarchical search
Re: Deep hierarchical search
- Subject: Re: Deep hierarchical search
- From: Klaus Berkling <email@hidden>
- Date: Wed, 26 Sep 2007 07:57:34 -0700
Thanks Mike.
I'll need to spend some more undistracted time figuring this out....
Sorry for the delay in responding. I appreciate your help.
On Sep 21, 2007, at 4:13 AM, Mike Schrag wrote:
If your tree is arbitrarily deep (which is sounds like it is),
there is no magic bullet for this -- it's going to suck. I've
written a couple posts on this before:
http://lists.apple.com/archives/Webobjects-dev/2006/Jun/msg00005.html
and
http://lists.apple.com/archives/webobjects-dev/2007/Jul/msg00471.html
Somewhere there's a third one, but I can't find it.
ms
On Sep 20, 2007, at 9:40 PM, Klaus Berkling wrote:
I hope someone has thoughts on performing a search through a
hierarchical data model.
I have a WO application that receives, stores and retrieves
student study information. More here:
http://www.dyned.com/products/internetrm.shtml
In my model I have a group entity which have sub-groups via one-to-
many relationship back to itself. These groups then have classes
with students. There is a class entity with many-to-many
relationships to the student entity. A student can be in more then
one class.
There is a search I need to implement that returns matching
groups, classes and students within a givem parent group.
I can reach all the objects through relationships so starting with
a parent group I can walk through all the sub-groups, classes and
students arrays. This is time consuming.
I'm trying to think of a fetch specification that avoids some of
the recursive looping I do now.
Any thoughts? Many thanks in advanced.
kib
"Success is not final, failure is not fatal: it is the courage to
continue that counts.”
- Winston Churchill
--
Klaus Berkling
Systems Administrator
DynEd International, Inc.
www.dyned.com | web.mac.com/kib
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kib
"Success is not final, failure is not fatal: it is the courage to
continue that counts.”
- Winston Churchill
--
Klaus Berkling
Systems Administrator
DynEd International, Inc.
www.dyned.com | www.eskimo.com/~kiberkli/
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