public function setDefaultActivity($activity)
 {
     $this->getObject()->setActivity($activity);
     $this->setDefault('Activity_id', $activity->getId());
     $this->widgetSchema['Activity_id'] = new sfWidgetFormInputHidden();
     $this->widgetSchema->setLabel('Activity_id', 'Activity');
     if ($activity->countReservationreasons() > 0) {
         $this->widgetSchema['ReservationReason_id'] = new sfWidgetFormPropelChoice(array('model' => 'Reservationreason', 'add_empty' => false, 'criteria' => ReservationreasonPeer::getFromActivityCriteria($activity->getId())));
         $this->widgetSchema->setLabel('ReservationReason_id', 'Reason');
         // FIXME: On dirait que le critère n'est pas pris en compte : bug de symfony ?
         $this->validatorSchema['ReservationReason_id'] = new sfValidatorPropelChoice(array('model' => 'Reservationreason', 'column' => 'id', 'required' => true, 'criteria' => ReservationreasonPeer::getFromActivityCriteria($activity->getId())));
     }
     if ($this->getObject()->isNew()) {
         $this->setDefault('guests_count', $activity->getMinimumOccupation() - 1);
     }
 }