Graceas

class FormErrorsSerializer {

    public function serializeFormErrors(\Symfony\Component\Form\Form $form, $flat_array = false, $add_form_name = false, $glue_keys = '_')
    {
        $errors = array();
        $errors['global'] = array();
        $errors['fields'] = array();

        foreach ($form->getErrors() as $error) {
            $errors['global'][] = $error->getMessage();