Symfony 1.2

h1. Validadores de formularios

TuClaseForm.class.php 

public function configure() 

{ 

  ... 

} 

$this->validatorSchema->setPostValidator( 

    new sfValidatorCallback(array('callback' => array($this, 'validarPago'))) 

); 

public function validarPago($validator, $values) 

{ 

  $cuota_minima = Doctrine_Query::create()->from('Contrato c')->where('c.id = ?',$values['contrato_id'])->fetchOne()->getCuotaMinima(); 

// Otra forma de hacer la consulta anterior 

// $cuota_minima = Doctrine_Core::getTable('Contrato')->find($values['contrato_id'])->get('cuo ta_minima'); 

  if ($values['valor_pago'] < $cuota_minima) 

  { 

    $error = new sfValidatorError($validator, 'Debe ingresar un pago mayor o igual al monto minimo'); 

    throw new sfValidatorErrorSchema($validator, array('campo_que_mostrara_el_error' => $error)); 

  } 

  return $values; 

} 

-------------------------------------------

otra forma (sacado de:http://www.symfony-project.org/more-with-symfony/1_4/pt/05-Custom-Widgets-and-Validators)

class sfWidgetFormTrilean extends sfWidgetForm

{

  public function configure ($options = array(), $attributes = array())

  {

    $this-addOption>('choices', array(

      0 => 'Não',

      1 => 'Sim',

      'null' => 'Nulo'

    ));

  }

  public function render($name, $value = null, $atributos = array(), $errors = array ())

  {

    $valor = $ valor === null? 'null': $valor;

    $options = array();

    foreach($this->getOption('choices') as $key => $opção)

    {

      $attributes = array ('value' = self::escapeOnce($key));

      if($ key == $value)

      {

        $attributes ['selected'] = 'selected';

      }

      $options [] = $this->renderContentTag(

        'option',

        self::escapeOnce($option),

        $attributes

      );

    }

    return $this->renderContentTag(

      'select',

      "\n". implode ("\n", $options). "\n",

      array_merge(array('name' => $name), $attributes

    ));

  }

}