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.shtmlIn 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 _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription:http://lists.apple.com/mailman/options/webobjects-dev/mschrag% 40mdimension.comThis email sent to [EMAIL PROTECTED]_______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription:http://lists.apple.com/mailman/options/webobjects-dev/kberkling% 40dyned.comThis email sent to [EMAIL PROTECTED]
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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