错误消息:调用未定义的方法 CI_DB_mysqli_result::results()

Error Message: Call to undefined method CI_DB_mysqli_result::results()

我是 CodeIgniter 的新手,在连接数据库后遇到以下错误。如果有人能帮助我,那真是太好了。我在 Whosebug 中查看了之前的答案,但 none 帮助了我。

控制器代码如下

    <?php

defined('BASEPATH') OR exit('No direct script access allowed');

class Welcome extends MY_Controller {

    public function index() {
        $this->load->view('home');
    }

    public function adminRegister() {
        //loading teh queries model 
        $this->load->model('queries');
        //Calling the getRoles function inside the roles
        $roles = $this->queries->getRoles();
        print_r($roles);
        exit();
        $this->load->view('register');
    }

    public function login() {
        echo 'login';
    }
}

型号代码

    <?php
//Details of queries whicha re used to interact with teh database

class Queries extends CI_Model {
//Created a function with the name getRoles  
    public function getRoles() {
        //Fetch the reocrds from the table
        $roles = $this->db->get('tbl_roles');
        if ($roles->num_rows() > 0) {
            return $roles->results();
        }
    }

}

?>

目前没有使用来自控制器的数据。任何帮助将不胜感激。提前致谢。

没有结果应该是结果

参考CI Doc

class Queries extends CI_Model {
    //Created a function with the name getRoles  
        public function getRoles() {
            //Fetch the reocrds from the table
            $roles = $this->db->get('tbl_roles');
            if ($roles->num_rows() > 0) {
                return $roles->result();
            }
        }

    }