public function configure()
  {
      $this->embedBeneficiarios();
  }

  public function addBeneficiarioForm($key)
  {
    $beneficiarioForm = new PersonaBeneficiarioForm(new Persona());

    // embebiendo el nuevo beneficiario en el container
    $this->embeddedForms['beneficiarios']->embedForm($key,$beneficiarioForm);
    // re-embebiendo el formulario container
    $this->embedForm('beneficiarios',$this->embeddedForms['beneficiarios']);
  }

  public function updateEmbeddedBeneficiarios($pariente)
  {
    $values['persona'] = $this->object->getId();
    $values['pariente'] = $pariente->getId();
    $values['beneficiario'] = 1;
    $beneficiario = new Beneficiario();
    $beneficiario->fromArray($values,BasePeer::TYPE_FIELDNAME);
    $beneficiario->save();
  }

   protected function getBeneficiarios()
   {
      if (!$this->object->getBeneficiariosRelatedByPersona())
      {
        return new Beneficiario();
      }
      else
      {
      return $this->object->getBeneficiariosRelatedByPersona();
      }
   }

  protected function embedBeneficiarios()
  {
    $BeneficiariosForm = new sfForm();

    // solo necesitamos embeber al fromulario via ajax
    if (false === sfContext::getInstance()->getRequest()->isXmlHttpRequest())
    {
      $beneficiarios = $this->getObject()->getBeneficiariosRelatedByPersona();
      if(count($beneficiarios) == 0)
      {
    // creamos 1 por default
    for ($i=0; $i<1; $i++)
    {
      $persona = new Persona();
//    $persona->setId($this->getObject()->getId());
      $beneficiarios[] = $persona;
    }
      }
      else
      {
    foreach($beneficiarios as $i => $beneficiario)
    {
      $beneficiarios[$i] = BeneficiarioPeer::toPersona($beneficiario);
    }
      }
      foreach($beneficiarios as $key => $v)
      {
    $beneficiarioForm = new PersonaBeneficiarioForm($v);
    $BeneficiariosForm->embedForm('beneficiario'.($key+1),$beneficiarioForm);
    $BeneficiariosForm->widgetSchema['beneficiario'.($key+1)]->setLabel('Beneficiario '.($key+1));
      }
    }

    $this->embedForm('beneficiarios', $BeneficiariosForm);
    $this->widgetSchema['beneficiarios']->setLabel('Beneficiarios');
  }
  /**
  **    Sobreescribirmos el método bind para manejar los formularios embebidos
  **/
  public function  bind(array  $taintedValues = null, array $taintedFiles = null)
  {
    foreach($taintedValues['beneficiarios'] as $key => $form) {
        if(false === $this->embeddedForms['beneficiarios']->offsetExists($key))
    {
      $this->addBeneficiarioForm($key);
    }
    }
    parent::bind($taintedValues,$taintedFiles);
  }

  /**
  *  sobreescribimos el método saveEmbeddedForms para que guarde correctamente
  */
  public function saveEmbeddedForms($con = null, $forms = null)
  {
    if(null === $con)
    {
      $con = $this->getConnection();
    }

    if(null === $forms)
    {
      $beneficiarios = $this->getValue('beneficiarios');
      $forms = $this->embeddedForms;

      foreach($this->embeddedForms['beneficiarios'] as $name => $form)
      {
    if(!isset($beneficiarios[$name]))
    {
      unset($forms['beneficiarios'][$name]);
    }
      }
    }

    foreach($forms as $form)
    {
      if($form instanceof sfFormObject)
      {
    if($form->getObject()->isNew())
    {
      $form->saveEmbeddedForms($con);
      $form->getObject()->save($con);
      $this->updateEmbeddedBeneficiarios($form->getObject());
    }
      }
      else
      {
    $this->saveEmbeddedForms($con,$form->getEmbeddedForms());
      }
    }
  }// saveEmbeddedForms()

/**
* esto es el action de tu clase actions
*/
  public function executeAddBeneficiarioForm(sfWebRequest $request)
  {
    $this->forward404Unless($request->isXmlHttpRequest());
    $number = intval($request->getParameter("num")+1);
    $key = 'beneficiario'.$number;

    if($asociado = AsociadoPeer::toPersona(AsociadoPeer::retrieveByPk($request->getParameter('id'))))
    {
      $form = new PersonaForm($asociado);
    }
    else
    {
      $form = new PersonaForm(null);
    }

    $form->addBeneficiarioForm($key);

    return $this->renderPartial('addBeneficiario',array('field'=>$form['beneficiarios'][$key],'num'=>$number));
  }