colocar un item por defecto a un combo relacionado

public function getMenuCardForCombo(){

        $q = Doctrine_Query::create()

          ->select(‘m.*’)

          ->from(‘MenuCard m’);

        $results = $q->execute();

        foreach($results as $menu){

            $choice[$menu->getId()] = $menu->getName();

        }

        return $choice;

    }

====================no funciona para validar “required”=========================================

        $choices = array(‘Seleccione un item’) + Doctrine::getTable(‘MenuCard’)->getMenuCardForCombo();

        $this->widgetSchema[‘menu_card_id’] = new sfWidgetFormSelect(array(‘choices’ => $choices));

        $this->validatorSchema[‘menu_card_id’] = new sfValidatorChoice(array(‘choices’ => array_keys($choices)));

====================otro metodo: validar “required”=========================================

‘menu_card_id’ => new sfWidgetFormDoctrineChoice(array(‘model’ => ‘MenuCard’, ‘add_empty’ => true)),

$this->validatorSchema[‘menu_card_id’]->setOption(‘required’, true);