Re: "Null child not allowed" on the TreeTable

[Nikita Shah]

Thanks Sebastein for your reply.

Actually am having a scenario wherein i have a data table and each row of the data table has to have 3 columns with 1 of the cloumn having tree, as exaplined with the code in the previous post. Isnt there some workarounf to achive this..?


Sébastien Marin <[EMAIL PROTECTED]> wrote:

Why do you want to insert your treeTable on a DataTable ?
The treeTable component do it for you :


var="composite"
styleClass="tree"
nodeClass="treenode"
headerClass="treeHeader"
footerClass="treeFooter"
rowClasses="a, b"
columnClasses="col1, col2"
selectedNodeClass="treenodeSelected"
expandRoot="true">























On this exemple, the treeTable make a table with 3 columns. The tree is insert
on the second column.



Selon Nikita Shah :

-> Hello Sebastein,
->
-> Did you have a workaround for the problem you were facing of null child..?
-> I am also using the MyFaces treeTable component. I have a list of tasks
-> and their subtasks. I want to display task as the root node and sub-tasks
-> as its children.
->
-> Following is my jsp page -
->
->
-> rowClasses="taskTable_Row1,taskTable_Row2" var="task"
-> columnClasses="task_nodeColumn,task_groupColumn,task_weightColumn"
-> value="#{projectLeaf.tasks}">
->
->
->
-> var="treeItem" expandRoot="true">
->
->
->
->
->
->
->
->
->
->
-> Participants

->
->
->
-> The bean method is as below -
->
-> public DefaultTreeModel getSubTaskTree()
-> {
-> DefaultMutableTreeNode root = new DefaultMutableTreeNode(new
-> Task(1,"root"));
-> DefaultMutableTreeNode a = new DefaultMutableTreeNode(new Task(2,
-> "A"));
-> root.insert(a);
-> DefaultMutableTreeNode b = new DefaultMutableTreeNode(new Task(3,
-> "B"));
-> root.insert(b);
-> DefaultMutableTreeNode c = new DefaultMutableTreeNode(new Task(4,
-> "C"));
-> root.insert(c);
-> DefaultTreeModel treeModel = new DefaultTreeModel(root);
-> return treeModel;
-> }
->< br>-> I get the following error
-> Base is null: task
->
-> Wud appreciate your help if you have come across such error or have any
-> idea.
->
-> TIA
-> Nikita
->
->
->
-> ---------------------------------------------------------------------
-> Ability is what you're capable of.
-> Motivation determines what you do.
-> Attitude determines how well you do it.
->
-> ---------------------------------
-> Yahoo! Shopping
-> Find Great Deals on Holiday Gifts at Yahoo! Shopping


|Cordialement, Sébastien MARIN.|
|------------------------------|
|-> http://www.marin-s.com <-|
|------------------------------|

---------------------------------------------------------------------
Ability is what y ou're capable of.
Motivation determines what you do.
Attitude determines how well you do it.

---

Yahoo! Photos
Ring in the New Year with Photo Calendars. Add photos, events, holidays, whatever.