用CakePHP创建restapi

我必须使用CakePHP为移动后端创建RESTAPI。在遵循说明之后，我已经能够设置创建RESTAPI的要求。问题是，当我使用

\u serialize

变量时，我的输出中得到了一个

null

。这是我的密码：

class InvitationController extends AppController {

    public $components = array('RequestHandler');

    public function index() {

    }

    public function add() {

        if ($this->request->is('post')) {
            $this->loadModel('Organizer');

            $numPeople = $this->request->data['numpeople'];
            $share = $this->request->data['myshare'];
            $organizer = $this->request->data['organizer'];     
            $organizerMobile = $this->request->data['organizermobile'];
            $this->set('organizerMobile', $organizerMobile);    
            $deadline = $this->request->data['deadline'];

            $links = array();       

            date_default_timezone_set("Asia/Calcutta");
            $now = date('Y-m-d');
            $lastOrganizer = $this->Organizer->find('first', array(
                'order' => array('Organizer.id' => 'desc')
            ));

            $checkOrganizer = $this->getOrganizerDetails($lastOrganizer);

            $pass = //something;


            // save data in organizers table
            $this->organizer->create();
            $this->organizer->save(
                array(
                    'name' => $organizer,
                    'mobile' => $organizerMobile,
                    'p_id' => 1,
                    'share' => $share,
                    'deadline' => $deadline,
                    'password' => $pass,
                    'group_cardinality' => $numPeople,
                    'created_on' => $now,
                )
            );

            $message = 1;
            $this->set(array(
                'message' => $message,
                '_serialize' => array($message)
            ));
        }
    }
}   

当我向

POST/invitation.json

发出请求时，我在输出中得到

null

，状态为

200

。另一方面，如果我只是在

控制器

或

视图

中执行

echo json_encode（$message）

，我会得到正确的输出。我想我做错了什么。请帮忙

这是错误的：

 '_serialize' => array($message)

请注意，它在提供的示例中正确地显示了它

 '_serialize' => array('message')

---

我的错。我应该看到的。谢谢！