在null错误上调用成员函数get()

Ver*_*ica 2 php codeigniter

我在CodeIgniter-2.2.1中不断收到此错误.(致命错误:在第6行的C:\ xampp\htdocs\ci\application\models\site_model.php中调用null上的成员函数get())我不是确定为什么会这样.我正确地调用了这个函数吗?第6行是$ this-> load-> model('site_model');

控制器site.php

<?php
 class Site extends CI_Controller{
function index(){
    $this->load->model('site_model');
    $data['records'] = $this->site_model->getAll();
    $this->load->view('home', $data);
    }}
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site_model.php

<?php
class Site_model extends CI_Model{

  function getAll(){

    $q = $this->db->get('test');
    if($q->num_rows() >0){
    foreach ($q->result() as $row)
    {
     $data[] =$row;
    }
     return $data;
   }
 }
}
?>
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home.php查看页面

<!DOCTYPE>

<html>
<head>
    <title>Site</title>
</head>
<body>
    <div id="container">
        <p>My view has been loaded</p>
    <pre>

<?php print_r($records);?>
    </pre>

    </body>
    </html>
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vij*_*mar 8

你在加载数据库吗?

$this->load->database();
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