[2.1] Problem with webservices

I'm try to develop a simple webservices in CakePHP 2.1. So, i first created a DB table:

    CREATE TABLE IF NOT EXISTS `people` (
      `id` char(36) COLLATE utf8_bin NOT NULL,
      `first_name` varchar(100) COLLATE utf8_bin DEFAULT NULL,
      `last_name` varchar(100) COLLATE utf8_bin NOT NULL,
      `home_address` varchar(100) COLLATE utf8_bin DEFAULT NULL,
      `job_address` varchar(100) COLLATE utf8_bin DEFAULT NULL,
      `phone` varchar(20) COLLATE utf8_bin DEFAULT NULL,
      `fax` varchar(20) COLLATE utf8_bin DEFAULT NULL,
      `mail` varchar(100) COLLATE utf8_bin DEFAULT NULL,
      `birth_date` int(11) DEFAULT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin 

Than I've created a simple Person model:

    <?php
    class Person extends AppModel {
        public $name = 'Person';
    }

And respective controller:

    <?php
    class PeopleController extends AppController {
        public $components = array('RequestHandler');
    
        public function index() {      
            $people = $this->Person->find('all');
            $this->set(array(
                'people' => $people,
                '_serialize' => array('person')
            ));
        }
    }

and finally, in routes.php, I've mapped the proper roote:

    <?php
    Router::mapResources('people');
    Router::parseExtensions('json');
    Router::connect('/', array('controller' => 'pages', 'action' => 'display', 'home'));
    Router::connect('/pages/*', array('controller' => 'pages', 'action' => 'display'));
    CakePlugin::routes();
    require CAKE . 'Config' . DS . 'routes.php';

but when I try to reach ht_tp://localhost/cakephp/people.json I get:

    <pre class="cake-error"><a href="javascript:void(0);" onclick="document.getElementById('cakeErr501541d86308c-trace').style.display = (document.getElementById('cakeErr501541d86308c-trace').style.display == 'none' ? '' : 'none');"><b>Notice</b> (8)</a>: Undefined index: person [<b>CORE\Cake\View\JsonView.php</b>, line <b>89</b>]<div id="cakeErr501541d86308c-trace" class="cake-stack-trace" style="display: none;"><a href="javascript:void(0);" onclick="document.getElementById('cakeErr501541d86308c-code').style.display = (document.getElementById('cakeErr501541d86308c-code').style.display == 'none' ? '' : 'none')">Code</a> <a href="javascript:void(0);" onclick="document.getElementById('cakeErr501541d86308c-context').style.display = (document.getElementById('cakeErr501541d86308c-context').style.display == 'none' ? '' : 'none')">Context</a><pre id="cakeErr501541d86308c-code" class="cake-code-dump" style="display: none;"><code><span style="color: #000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$this-&gt;autoRender&nbsp;=&nbsp;false;</span></code>
    <code><span style="color: #000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$this-&gt;View&nbsp;=&nbsp;$View;</span></code>
    <span class="code-highlight"><code><span style="color: #000000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$this-&gt;response-&gt;body($View-&gt;render($view,&nbsp;$layout));</span></code></span></pre><pre id="cakeErr501541d86308c-context" class="cake-context" style="display: none;">$view = null
    $layout = null
    $serialize = array(
    (int) 0 =&gt; &#039;person&#039;
    )
    $data = array()
    $key = &#039;person&#039;</pre><pre class="stack-trace">JsonView::render() - CORE\Cake\View\JsonView.php, line 89
    Controller::render() - CORE\Cake\Controller\Controller.php, line 957
    Dispatcher::_invoke() - CORE\Cake\Routing\Dispatcher.php, line 193
    Dispatcher::dispatch() - CORE\Cake\Routing\Dispatcher.php, line 161
    [main] - APP\webroot\index.php, line 92</pre></div></pre>{"person":null}

Where is the error?

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