handy makeReadOnly() function to put in BaseForm

BaseForm.php

<?php

class BaseForm extends sfFormSymfony
{
  public function makeReadOnly($field = null)
  {
    if ($field instanceof sfWidget) 
    {
      $field->setAttribute('disabled', 'disabled');

      if ($field instanceof sfWidgetFormSchemaDecorator) 
      {
        foreach ($field->getFields() as $key => $childWidget) 
        {
          $this->makeReadOnly($childWidget);
        }
      }
    }
    else
    {
      if ($field === null) 
      {
        $field = array_keys($this->widgetSchema->getFields());
      }
      
      foreach ((array) $field as $name) 
      {
        $this->makeReadOnly($this->widgetSchema[$name]);
        unset($this->validatorSchema[$name]);
      }
    }
  }
}