CakePHPのValidationのエラー情報を取得

いつも忘れるのでメモ

Validationのエラーは$model->validationErrorsに入っている
http://api.cakephp.org/2.4/class-Model.html#$validationErrors

<?php

class UsersController extends AppController {
	public function add() {
		if ($this->request->is('post')) {
			$this->User->create();
			if ($this->User->save($this->request->data)) {
				$msg = __('The user has been saved.' );
				$this->Session->setFlash($msg);
				$this->redirect(array('action' => 'index'));
			} else {
				$this->Session->setFlash(__('The user data could not be saved. Please, try again.'));

				// validationエラーをログに残す
				$this->log("validationErrors=" . var_export($this->User->validationErrors, true));
			}
		}
	}
}