Rails - Jul 2007 - LiveTree problem: non-AR model

Hi you all, I''m trying to use LiveTree with a non-AR model. As a trial,
I''ve written this model, that may be wrong. It just generates nodes.

class Elemento
  attr_reader :nombre
  attr_reader :id
  attr_reader :parent
  def initialize(value,id,parent)
    @nombre = value
    @id = id
    @parent = parent
  end
  def self.find_root()
    elem = Elemento.new("Raiz",0,nil)
    elem
  end
  def children
    children_array = []
    i=1
    for i in 1..4
      children_array << Elemento.new("Child"+i.to_s(),i,
self.find_root())
      i=i+1
    end
    return children_array
  end
end

On the other hand, my controller is:
live_tree :prueba_tree, :model => :elemento, :get_item_name_proc =>
Proc.new { |item| item.nombre }
  def index
        @root_prueba = Elemento.find_root()
  end

However, even though in the view the root with the 4 children appears,
when click on any of them I get:
LiveTreeError: could not get data from server. When I click on a child,
the javascript alert does not print the name (just print "undefined").

Any ideas? :(

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Well, the problem was that I wasn''t stating which are the exact
children
of every node. The solution could be:

def initialize(value,id,parent)
    @name = value
    @id = id
    @parent = parent
    @children = []
  end

def self.find_root()
  @@root = Elemento.new("Root",0, nil)
  @@child1 = Elemento.new("Child 1",1,@@root)
  @@child2 = Elemento.new("Child 2",2,@@root)
  @@child3 = Elemento.new("Child 3",3,@@root)
  @@child4 = Elemento.new("Child 4",4,@@root)
  @@child21 = Elemento.new("Child 21",21,@@child2)
  @@child22 = Elemento.new("Child 22",22,@@child2)
  @@child23 = Elemento.new("Child 23",23,@@child2)
  @@child24 = Elemento.new("Child 24",24,@@child2)

  @@root.children = [@@child1,@@child2,@@child3,@@child4]
# @@child2.children = [@@child21,@@child22,@@child23,@@child24]
  @@root
end

However, you will see a line in comments. If I add this line, the same 
problem as the previous post appears. And now I am stating the parent 
and the children of every node. What I am doing wrong?

Thanks.

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