Self Association parent_id doesn't display in view drop down

Hi

I am having some trouble getting a self association parent_id to show up in the scaffolding drop down list of a view.

I have the following baked add action in my controller
    public function add() {
        if ($this->request->is('post')) {
            $this->Item->create();
            if ($this->Item->save($this->request->data)) {
                $this->Session->setFlash(__('The item has been saved'));
                $this->redirect(array('action' => 'index'));
            } else {
                $this->Session->setFlash(__('The item could not be saved. Please, try again.'));
            }
        }
        $parentItems = $this->Item->ParentItem->find('list');
        $collections = $this->Item->Collection->find('list');
        $this->set(compact('parentItems', 'collections'));
    }

This passes parentItems and collections to my view (add.ctp) but the view outputs an empty dropdown box for "parent_id"

    <fieldset>
        <legend><?php echo __('Add Item'); ?></legend>
    <?php
        echo $this->Form->input('parent_id');
        echo $this->Form->input('collection_id');
        echo $this->Form->input('name');
    ?>
    </fieldset>

Does anyone have an idea what I am doing wrong? I have the following associations setup in my model
    Item Model/Item.php - contains columns id, parent_id, lft, rght & name
   
    public $belongsTo = array(
        'ParentItem' => array(
            'className' => 'Item',
            'foreignKey' => 'parent_id',
            'conditions' => '',
            'fields' => '',
            'order' => ''
    ),

        public $hasMany = array(
        'ChildItem' => array(
            'className' => 'Item',
            'foreignKey' => 'parent_id',
            'dependent' => false,
            'conditions' => '',
            'fields' => '',
            'order' => '',
        ),

I also see the parentItems array in the variables of the debug toolkit so I know they are there... just need to know how to show the "name" for each "parent_id"

Thanks in advance for any help.

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