sfWidgetFormDoctrineChoice for NestedSet model - symfony1

Question

I'm experiencing a difficulty in rendering sfWidgetFormDoctrineChoice (set of checkboxes) widget for a NestedSet structure.
class ModelForm extends BaseModelForm
{
public function configure()
{
$this->setWidget('relatedmodel_list', new sfWidgetFormDoctrineChoice(array(
'expanded' => true,
'multiple' => true,
'model' => 'Relatedmodel',
'table_method' => 'fetchTree'
)));
}
}
class RelatedmodelTable extends Doctrine_Table
{
/**
* Gets tree elements in one query (one root only)
*/
public function fetchTree()
{
$q = $this->createQuery('m')
->addOrderBy('m.lft');
$tree = $q->execute(array(), Doctrine_Core::HYDRATE_RECORD_HIERARCHY);
return $tree;
}
}
Now, if I just render form like this: <?php echo $form['relatedmodel_list'] ?>
It will only display form widgets (checkboxes) for first level elements of my hierarchy.
I am looking for an implementation that will allow me to iterate over widget's choices the way I would iterate over collection:
<?php foreach ($form['relatedmodel_list'] as $widget): ?>
<?php echo $widget->render() ?>
<?php foreach ($widget->getChildren() as $child_widget): ?>
<?php echo $child_widget->render() ?>
<?php endforeach; ?>
<?php endforeach; ?>

Answer 1

I'm using sfWidgetFormTree to display my nestedSet. If you really want to display your tree in a flat way don't use HYDRATE_RECORD_HIERARCHY.
The widget linked is very convinient, you just have to provide a choices array like this :
$choices = array(
1=> array('label'=>'test', 'children'=>array(
2=> array('label'=>'test2', 'children'=> array(
3=> array('label'=>'test3'),
4=> array('label'=>'hans')
)),
5=> array('label'=>'wurst')
)),
6=>array('label'=>'letzter')
);

Answer 2

If anyone cares, I think I found a wonderful solution which allows you to recursively iterate over checkboxes in template. The idea behind it is that you configure 'relatedmodel_list' widget as a single checkbox and render it many times in your template (while iterating over relatedmodel collection).
class ModelForm extends BaseBookForm
{
public function configure()
{
$this->setWidget('relatedmodel_list', new myWidgetFormInputCheckbox());
}
}
Checkboxes now have incorrect name and value attributes. This can be fixed very easily:
class myWidgetFormInputCheckbox extends sfWidgetFormInputCheckbox
{
public function render($name, $value = null, $attributes = array(), $errors = array())
{
//fix value checking
if (in_array($attributes['value'], (array)$value))
{
$attributes['checked'] = 'checked';
}
//fix name for multiple
$name = $name . "[]";
return parent::render($name, null, $attributes, $errors);
}
}
Now we can recursively render our form widget in template:
//_form.php
<ul>
// Model::getRelatedTree() is proxy to Relatedmodel::fetchTree()
<?php include_partial('node', array('node' => $form->getObject()->getRelatedTree(), 'form' => $form)) ?>
</ul>
//_node.php
<?php foreach ($node as $item): ?>
<li>
<?php echo $form['pages_list']->render(array('value'=>$item->id)) ?>
<?php echo $form['pages_list']->renderLabel((string)$item) ?>
<?php if (isset($item['__children']) && count($item['__children']) > 0): ?>
<ul>
<?php include_partial('node', array('node' => $item['__children'], 'form' => $form)) ?>
</ul>
<?php endif; ?>
</li>
<?php endforeach; ?>