Question

I have in schema.yml:

Quest:
  columns:
    yes_no:  { type: boolean, notnull: true }
    answer:   { type: string(100), notnull: false }

and QuestForm

$this->widgetSchema['yes_no'] = new sfWidgetFormSelectRadio(array('choices' => array(1 => 'yes', 0 => 'no')));

In template default I would like to render only this widget on start, but if user checks “no”, then I would like to render widget answer also, with textbox and this must be required => true, not null.
What is the best way to make it?

Answer 1

Symfony-like, this is achieved with a PostValidator !

First, as @samura mentioned, hide and observe the answer widget via (e.g.) jQuery, then use a PostValidator.

// Form.class.php
/* ..... */
$this->validatorSchema->setPostValidator(
    new sfValidatorCallback(array('callback' => array($this, 'checkAnswer')))
);

Then implement your validator

// Form.class.php something else
public function checkAnswer($validator, $values)
{
   if (($values['yes_no'] == '0') && (empty($values['answer')))
   {
       $error = new sfValidatorError($validator, 'Invalid answer');

       // throw answer error
       throw new sfValidatorErrorSchema($validator, array('answer' => $error));
   }

   return $values;
}

You can find more here