我创建了一个模块，该模块中有一个类扩展到ObjectModel： 模块名称：

<?php
if (!defined('_PS_VERSION_'))
    exit;

class StoreOrder extends ObjectModel
{
    public $id_store_order;
    public $id_customer;
    public $nature_piece;
    public $client_code;
    public $internal_reference;
    public $store_code;
    public $store_name;
    public $ticket_date;
    public $custumer_name;
    public $ticket_number;
    public $product_number;
    public $total_ht;
    public $total_ttc;
    public $payment_mode;

    public static $definition = array(
        'table' => 'ps_store_order','primary' => 'id_store_order','fields' => array(
            'id_store_order' => array('type' => self::TYPE_INT),'id_customer' => array('type' => self::TYPE_INT),'store_code' => array('type' => self::TYPE_STRING),'store_name' => array('type' => self::TYPE_STRING),'ticket_date' =>    array('type' => self::TYPE_STRING),'ticket_number' =>  array('type' => self::TYPE_STRING),'product_number' => array('type' => self::TYPE_STRING),'total_ht' => array('type' => self::TYPE_STRING),'total_ttc' => array('type' => self::TYPE_STRING),'payment_mode' => array('type' => self::TYPE_STRING),)
    );

    public function __construct()
  {
    parent::__construct();
    }

    public static function getByIdCustomer($id_customer) {
        $sql = "SELECT * FROM `ps_store_order` WHERE `id_customer` = ".$id_customer;
        $result = Db::getInstance()->executeS($sql);
        return $result;
    }


}

但是，如果我将此类包含在其他模块中以使用它，则该类将在未定义的“ _PS_VERSION_”步骤中阻塞，并且我将删除它不返回任何条件的条件（代码是库存的，我不知道为什么）>

谢谢你。