user login error

[eluser]learning_php[/eluser]
Hi,

i have look at the database table and it is username, i have also added the session to the autoload but still get the same error:
A PHP Error was encountered

Severity: Notice

Message: Undefined index: ID

Filename: models/MAdmins.php

Line Number: 17

this is a test
row_array1

here is my current code:

model:

Code:

<?PHP
    class MAdmins extends Model{
        
        function MAdmins(){
            
            parent::Model();
        }
        
        function verifyUser($u,$pw){
            $this->db->select('id,username');
            $this->db->where('username',$u);
            $this->db->where('password',$pw);
            
            $Q = $this->db->get('members');
            if ($Q->num_rows()>0){
                $row = $Q->row_array();
                $_SESSION['userid'] = $row['ID'];
                $_SESSION['username'] = $row['username'];
            }else{
                $this->sesson->set_flashdata('error','you have enter the wrong details');
            }
        }
    }
?>

controller:

Code:

<?PHP

class gallery extends Controller {
    
        
    function gallery()
    {
    session_start();
    parent::Controller();
    $this->load->database();
    $this->load->helper(array('url', 'form', 'date', 'cookie'));
    $this->load->library(array('form_validation', 'upload', 'Erkanaauth', 'session'));
    
    }
    
    function index(){
        $this->load->view('gallery_view');
    }
    function verify(){
        if ($this->input->post('username')){
            $u = $this->input->post('username');
            $pw = $this->input->post('password');
            
            $this->MAdmins->verifyUser($u,$pw);
            
            if ($_SESSION['userid']>0){
                redirect('Homepage');
            }
            $this->load->view('test_view');
        }
    }
}
?>

form:

Code:

<?= form_open('gallery/verify') ?>
  Username: <input type="text" name="username" id="username" value="" Autocomplete="off" /><br />
  <br />
  Password: &lt;input type="password" name="password" id="password" value="" /&gt;&lt;br />
  &lt;input type="submit" value="Login" /&gt;
&lt;?=form_close() ?&gt;