Comments on: Nested Set Trees in ColdFusion (v1.0)

By: Kevan Stannard

Kevan Stannard — Tue, 08 Feb 2011 21:21:52 +0000

Hi TikiHowpu

Yes, you can have multiple trees in the one table. You just need to pass in the treeId to the NestedSetTreeTable getNestedTree() function:

dut = nstTable.getNestedSetTree(1);
eng = nstTable.getNestedSetTree(2);
ger = nstTable.getNestedSetTree(3);

By: TikiHowpu

TikiHowpu — Tue, 08 Feb 2011 13:43:00 +0000

Hi Kevan,

Thanks for sharing this.
Is it also possible to have multiple trees within the same table?

I would like to have something like this: “Dutch” (treeID:1), “English” (treeID:2), “German” (treeID:3) and each with their own nodes. It seems that only one treeID is supported ?

By: Kevan Stannard

Kevan Stannard — Sat, 05 Feb 2011 11:11:45 +0000

Hi Hussein, thanks, sounds like a good idea. I am actually planning to get the code out onto github to hopefully make it a bit easier for anyone to play around with it.

By: Hussein Grant

Hussein Grant — Fri, 04 Feb 2011 02:45:58 +0000

Hi Kevan,

I just had a thought about adding a “level“ field to the NST table, which can then be adjusted during inserts, updates and move operations instead of generating all the category levels on the fly each time you retrieve a category tree. I was thinking this could help improve query performance when calling a large category tree. Thanks.

By: John Allen

John Allen — Mon, 22 Nov 2010 21:13:25 +0000

Hey Kevan,
Can I get with you via email, off this thread, to discuss Oracle Support? I have a working version for Oracle, but some tiny code changes needed to be made.

Thanks, again, enjoying the lib.

By: Kevan Stannard

Kevan Stannard — Thu, 18 Nov 2010 22:28:36 +0000

Thanks John. I don’t have an oracle db setup at the moment to test a setup script, but it would be nice to add in at some time.

By: John Allen

John Allen — Thu, 18 Nov 2010 17:14:25 +0000

I really enjoy using this lib. Thanks a lot.

R U planing on creating a ORACLE sql setup script?

Again, great lib.

By: Kevan Stannard

Kevan Stannard — Wed, 24 Mar 2010 15:18:07 +0000

I spoke with Will and Adam offline on this.

There seems to be a compatibility issue with Railo that is causing this problem. The workaround for now is to do a global search and replace:

Replace returntype="Node" with returntype="any"
Replace type="Node" with type="any"

I am investigating and will post an upate when I have more details.

By: Adam Rifat

Adam Rifat — Wed, 24 Mar 2010 04:54:39 +0000

Hi Kevan,

Another issue which I’m not sure if you can shed any light on. I’m trying to set up a server running railo with F/W1 and your nested set tree component. However, I’m getting the following error message:

the function init has a invalid return value , can’t cast Object type [Component admin.com.nstree.Node] to a value of type [xml]

which seems to be related to the nst component. I will also post on the Railo mailing list but is there anything obvious that I’m missing. This works on CF8 of course so I assume it is Railo related….

Thanks in advance,

Adam

By: Will Tomlinson

Will Tomlinson — Tue, 23 Mar 2010 04:51:18 +0000

Hey Kevin, been a long time since we talked. I have a question. I’m trying to get the nested set tree system working on Railo, but encountering a few issues.

If you have a spare moment, could you shoot me an email so I can show you what it’s doing.

Thanks,
Will