/**
* Called before the form is generated
*
* Sets up a default rule for content tables so there are no
* identical headlines
*
* @see NController::preGenerateForm();
* @access public
* @return null
*/
function preGenerateForm()
{
$model =& $this->getDefaultModel();
$fields = $model->fields();
if (in_array('cms_headline', $fields)) {
$model->form_rules[] = array('cms_headline', 'This headline is already being used', 'callback', array(&$this, 'uniqueHeadline'));
}
parent::preGenerateForm();
}
