Changing the validator of an embedded form field

I have this schema:

propel:
  autor:
    id: ~
    nombre: { type: varchar, size: 255, required: true }

  libro:
    id: ~
    autor_id:   { type: integer, size: 11, foreignTable: autor,
foreignReference: id}
    titulo:     { type: varchar, size: 255 }
    paginas:    { type: varchar, size: 255, required: true }

and this form class:

class AutorForm extends BaseAutorForm
{
  public function configure()
  {
    $this->embedRelation('Libro');
  }

public function foo()
{
    $this->validatorSchema['Libro']['newLibro1']['paginas'] = new
sfValidatorPass();
    return $this;

}
}

I'm calling foo() after the bind() (inside processForm()).

After submiting the Auto-Libro form, if I don't insert anything in the field 'paginas' of the first embedded form (Libro), it shows "Required".

But.. why if paginas has a validator-pass?

EDIT: after matt's answer, this is my code:

var_dump($this->embeddedForms['Libro']->validatorSchema['newLibro1']['paginas']);
$this->embeddedForms['Libro']->validatorSchema['newLibro1']['paginas'] = new sfValidatorPass(array('required' => false));
var_dump($this->embeddedForms['Libro']->validatorSchema['newLibro1']['paginas']);

It prints this:

object(sfValidatorString)[152]
  protected 'requiredOptions' => 
    array
      empty
  protected 'defaultMessages' => 
    array
      'required' => string 'Required.' (length=9)
      'invalid' => string 'Invalid.' (length=8)
      'max_length' => string '"%value%" is too long (%max_length% characters max).' (length=52)
      'min_length' => string '"%value%" is too short (%min_length% characters min).' (length=53)
  protected 'defaultOptions' => 
    array
      'required' => boolean true
      'trim' => boolean false
      'empty_value' => string '' (length=0)
      'max_length' => null
      'min_length' => null
  protected 'messages' => 
    array
      'required' => string 'Required.' (length=9)
      'invalid' => string 'Invalid.' (length=8)
      'max_length' => string '"%value%" is too long (%max_length% characters max).' (length=52)
      'min_length' => string '"%value%" is too short (%min_length% characters min).' (length=53)
  protected 'options' => 
    array
      'required' => boolean true
      'trim' => boolean false
      'empty_value' => string '' (length=0)
      'max_length' => int 255
      'min_length' => null

object(sfValidatorPass)[196]
  protected 'requiredOptions' => 
    array
      empty
  protected 'defaultMessages' => 
    array
      'required' => string 'Required.' (length=9)
      'invalid' => string 'Invalid.' (length=8)
  protected 'defaultOptions' => 
    array
      'required' => boolean true
      'trim' => boolean false
      'empty_value' => null
  protected 'messages' => 
    array
      'required' => string 'Required.' (length=9)
      'invalid' => string 'Invalid.' (length=8)
  protected 'options' => 
    array
      'required' => boolean false  <<<<<<<<<<<&开发者_如何学编程lt; FALSE <<<<<<<<<<<<<<<<<<
      'trim' => boolean false
      'empty_value' => null

The problem is still the same: when i try to submit the form, the field 'paginas' is still required. Why?

sf 1.4/propel 1.6

Javi

Almost all validators, including the sfValidatorPass, default to required=true.

I believe the sfValidatorPass doesn't mean "it always passes validation" it means "pass the submitted value through without cleaning it or checking anything."

sfValidatorPass is an identity validator. It simply returns the value unmodified.

So I think you can just do

$this->validatorSchema['Libro']['newLibro1']['paginas'] = new 
    sfValidatorPass(array('required' => false));