在会话中序列化对象时不完整的 PHP 类 [英] Incomplete PHP class when serializing object in sessions

问题描述

我正在研究购物车(购物车模型).它的受保护属性之一是_items"，它包含一组 Product 对象.它们(产品)都存储在 DB 中以填充会话(使用 ZF、Zend_Session_SaveHandler_DbTable() 等).

I'm working on a shopping cart (Cart model). One of its protected properties is "_items", which holds an array of Product objects. They (Products) all get stored in DB for populating the session (using ZF, Zend_Session_SaveHandler_DbTable() etc.).

public function addItem(Model_Product $product, $qty)
{
    $qty = (int) $qty;
    $pId = $product->getId();

    if ($qty > 0) {
        $this->_items[$pId] = array('product' => $product, 'qty' => $qty);
    } else {
        // if the quantity is zero (or less), remove item from stack
        unset($this->_items[$pId]);
    }

    // add new info to session
    $this->persist();
}

在控制器中，我使用 ProductMapper 从 DB 中获取一个 Product obj 并将其提供给addItem()":

In the controller, I grab a Product obj from DB with the ProductMapper and provide it to "addItem()":

    $product1 = $prodMapper->getProductByName('cap');
    $this->_cart->addItem($product1, 2);

getProductByName() 返回一个新填充的 Model_Product 对象.

getProductByName() returns a new populated Model_Product object.

我通常得到

请确保您尝试操作的对象的类定义Model_Product"已_before_加​​载...

错误信息，会话转储明显显示

error message, a session dump obviously shows

['__PHP_Incomplete_Class_Name'] =>'模型_产品'

我知道在序列化之前声明类".我的问题是:如果首先注入(第一个参数)，我如何在 addItem() 中声明 Product 类?新声明(如 new Model_Product())不会覆盖 addItem() 中的参数(原始对象)吗?我必须再次在 Cart 模型中声明它吗?

I know about the "declaring the class before serializing it". My problem is this: how can I declare the Product class in addItem(), if it's injected (first param) in the first place? Wouldn't a new declaration (like new Model_Product()) overwrite the param (original object) in addItem()? Must I declare it in the Cart model again?

此外，如果我...在购物车中重新声明它，我肯定会得到一个Cannot redeclare class Model_Product.

Besides, I'll surely get a Cannot redeclare class Model_Product if I... redeclare it in Cart.

推荐答案

在 ZF 的引导程序中，会话在自动加载之前开始.

In ZF's bootstrap, the session was started before autoloading.

    /**
     * Make XXX_* classes available
     */
    protected function _initAutoloaders()
    {
        $loader = new Zend_Application_Module_Autoloader(array(
                    'namespace' => 'XXX',
                    'basePath' => APPLICATION_PATH
                ));
    }

    public function _initSession()
    {
        $config = $this->_config->custom->session;

        /**
         * For other settings, see the link below:
         * http://framework.zend.com/manual/en/zend.session.global_session_management.html
         */
        $sessionOptions = array(
            'name'             => $config->name,
            'gc_maxlifetime'   => $config->ttl,
            'use_only_cookies' => $config->onlyCookies,
//            'strict'           => true,
//            'path'             => '/',
        );

        // store session info in DB
        $sessDbConfig = array(
            'name'           => 'xxx_session',
            'primary'        => 'id',
            'modifiedColumn' => 'modified',
            'dataColumn'     => 'data',
            'lifetimeColumn' => 'lifetime'
        );

        Zend_Session::setOptions($sessionOptions);
        Zend_Session::setSaveHandler(new Zend_Session_SaveHandler_DbTable($sessDbConfig));
        Zend_Session::start();
    }

当我遇到我正在谈论的错误时，方法声明是相反的:_initSession() 是第一个，然后是 _initAutoloaders() - 而这个是采埃孚处理它们的确切顺序.

When I was getting the errors I was talking about, the method declaration was the other way around: _initSession() was first, then _initAutoloaders() - and this was the exact order ZF was processing them.

我会再测试一些，但这似乎有效(并且合乎逻辑).感谢您的所有建议.

I'll test some more, but this seems to work (and logical). Thanks for all your suggestions.

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