Magento 项目'的编程设置；s设置特殊价格不'；t棒

我正试图通过编程将一个项目添加到访问者的购物车中。在此过程中，该项目将获得自定义价格。在添加项目后最初显示的页面上，“我的购物车”摘要（在右栏中）表示购物车包含价格正确的项目。但是，当我转到“查看购物车”页面时，该商品将以其默认价格（而不是自定义价格）列出

如何使定制价格保持不变

谢谢你，
本

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代码如下：

$product = Mage::getModel('catalog/product');
$product->load(169);
$product->setSpecialPrice(10);

$cart = Mage::getSingleton('checkout/cart');
$cart->addProduct($product, array('qty' => 1, 'options' => array(5 => 'spec goes here' . time())));
$cart->save();

我尝试在$product->setSpecialPrice（）之后调用$product->save（），但结果是：

Warning: Invalid argument supplied for foreach()  in app\code\core\Mage\Eav\Model\Entity\Abstract.php on line 1068

#0 app\code\core\Mage\Eav\Model\Entity\Abstract.php(1068): mageCoreErrorHandler(2, 'Invalid argumen...', 'C:\Program File...', 1068, Array)
#1 app\code\core\Mage\Eav\Model\Entity\Abstract.php(1012): Mage_Eav_Model_Entity_Abstract->_collectSaveData(Object(Mage_Catalog_Model_Product))
#2 app\code\core\Mage\Core\Model\Abstract.php(318): Mage_Eav_Model_Entity_Abstract->save(Object(Mage_Catalog_Model_Product))
#3 app\code\local\BenGribaudo\RazaOrderGrid\controllers\IndexController.php(13): Mage_Core_Model_Abstract->save()
#4 app\code\core\Mage\Core\Controller\Varien\Action.php(418): BenGribaudo_RazaOrderGrid_IndexController->addAction()
#5 app\code\core\Mage\Core\Controller\Varien\Router\Standard.php(253): Mage_Core_Controller_Varien_Action->dispatch('add')
#6 app\code\core\Mage\Core\Controller\Varien\Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#7 app\code\core\Mage\Core\Model\App.php(340): Mage_Core_Controller_Varien_Front->dispatch()
#8 app\Mage.php(627): Mage_Core_Model_App->run(Array)
#9 index.php(80): Mage::run('', 'store')
#10 {main}