i user tree behavior,,but i build it like this table >> all parent
must be null field not the top parent only..i know that is wrong but i
need it to build menus...i use helper for that..but the problem i need
if the user click on Entertainment (parent) see all articles in
music(child) and movies(child),,so i check if Entertainment is null
find his children

|-------------|----------------- --------------|----------|-
|    Id      |  Parent_id   |    lft      |  rght   |  name
| -------------------------------|------------|----------
|-------
|   89      |     NULL      |   25     |   30     |  Entertainment
|            |                   |            |           |
|    90    |       89         |    26     |    27   |   Music
|            |                   |            |           |
|   91     |       89         |   28     |      29  |  Movies


On Dec 11, 9:20 am, Geoff Douglas <drdouglas...@gmail.com> wrote:
> May we assume that you are employing the Tree 
> Behavior<http://book.cakephp.org/view/1341/Basic-Usage>in this Section model?
>
> If so, the parent_id would only be null for the top most parent... correct?
> Generally, when you use a tree or this kind, you must look at it like a
> collection? So the top most element describes the collection. So, you would
> always assume is had children and that is always has a parent... then test
> accordingly.
>
> If not, then you have some more obvious errors in the code you provided...
> but before we get in to that... let's answer the Tree question.
>
> Let me know.

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