cakePHP 2.3 ファイルアップロード - FileBinderプラグイン

CREATE TABLE `attachments` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `model` text NOT NULL,
 `model_id` int(11) NOT NULL,
 `field_name` text NOT NULL,
 `file_name` text NOT NULL,
 `file_content_type` text NOT NULL,
 `file_size` int(11) NOT NULL,
 `file_object` longtext,
 `created` datetime DEFAULT NULL,
 `modified` datetime DEFAULT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

<?php
App::uses('AppModel', 'Model');

class User extends AppModel {
    public $actsAs = array('Filebinder.Bindable');
    public $displayField = 'username';

    public $bindFields = array(
        array('field' => 'photo')
    );

    public $validate = array(
        'username' => array('notempty'),
        'photo' => array(
            'allowExtention' => array(
                'rule' => array('checkExtension', array('jpg','pdf')),
                'message' => '拡張子が無効です',
                'allowEmpty' => true
            ),
            'fileSize' => array(
                'rule' => array('checkFileSize', '1MB'),
                'message' => 'ファイルサイズが1MBを超過しています'
            ),
            'illegalCode' => array(
                'rule' => array('funcCheckFile', 'checkIllegalCode'),
                'allowEmpty' => true
            )
        )
    );

    /**
    * checkIllegalCode
    * check include illegal code
    *
    * @param $filePath
    * @return
   */
    public function checkIllegalCode($filePath){
        $fp = fopen($filePath, "r");
        $ofile = fread($fp, filesize($filePath));
        fclose($fp);

        if (preg_match('/<\\?php./i', $ofile)) {
            return false;
        }
        return true;
    }
}
?>

<?php
App::uses('AppController', 'Controller');

class UsersController extends AppController {
    public $components = array('Session', 'Filebinder.Ring');

    //ユーザ登録画面
    public function index(){
        if($this->request->is('post')){
            $this->Ring->bindUp();
            $this->log($this->request->data);
            if($this->User->save($this->request->data)){
                $this->Session->setFlash('登録完了しました');
            }else{
                $this->Session->setFlash('登録が失敗しました');
            }
        }
    }

    //ユーザ一覧画面
    public function view(){
        $this->set('users',$this->User->find('all'));
    }
}

<h2>ユーザー登録</h2>
<div class="posts form">
  <?php echo $this->Form->create('User', array('action' => 'index', 'type' => 'file'));?>
  <?php echo $this->Form->input('username', array('type' => 'text'));?>
  <?php echo $this->Form->input('photo', array('type' => 'file'));?>
  <?php echo $this->Form->submit(__('Submit', true));?>
  <?php echo $this->Form->end();?>
</div>

<h2>ユーザー一覧</h2>
<?php foreach($users as $u):?>
<table>
<tr><td>名前</td><td><?php echo $u['User']['username']?></td></tr>
<tr><td>添付ファイル（ダウンロード）</td><td><?php echo $this->Label->link($u['User']['photo'])?></td></tr>
</table>
<?php endforeach;?>