kohana从模型model继承Model_Database获取数据库数据

model层：

class Model_Servicetest extends Model_Database {

function select()
{
$query = DB::select()->from('vlc_mac_servicetest')->execute();
return $query;
}
} // End Model

controller层：

public function action_select()
{
$this->template = view::factory('list');

$servicetest= model::factory('servicetest')->select();

$this->template->data = $servicetest;
}



view层：
<div>
<?php
foreach($data as $k=>$v)
{
echo($v['id']);

}


?>
</div>

class Model_Servicetest extends Model_Database {

function select()
{
$query = DB::select()->from('vlc_mac_servicetest')->execute();
return $query;
}
} // End Model