Magento产品加载-loadByAttribute和加载方法之间的差异 [英] Magento product load - difference between loadByAttribute and load methods

问题描述

今天我再次与Magento战斗:)，我发现

today I'm fighting with Magento again :) and I found a difference between

$product = Mage::getModel('catalog/product')->loadByAttribute('sku', $product_sku);

和

$product = Mage::getModel('catalog/product')->load($product_id);

有人能告诉我这两种方法之间的区别吗?我发现当我通过sku加载产品时，当我尝试用更改的数据重新保存产品时，出现错误异常'Varien_Exception'，消息为'无效的方法Varien_Object :: save保存在app \ code \ core \ Mage中\ CatalogInventory \ Model \ Observer.php(153):Varien_Object-> __ call('save'，Array)是正确的，因为一旦您尝试通过sku加载，则另一个观察者将产品的库存项目设置为Varien_Object，这看起来像陷阱或我只是不够了解，但是

Can anyone exaplain me a difference between these two approaches? I found that when I'm loading a product by sku then when I 'try to re-save it with changed data then I get error exception 'Varien_Exception' with message 'Invalid method Varien_Object::save in app\code\core\Mage\CatalogInventory\Model\Observer.php(153): Varien_Object->__call('save', Array) that's true because once you try to load by sku then another observer sets product's stock item as Varien_Object, that looks like pitfall or I just dont understand it enough, but

我从一开始就进行Magento的日常开发，因此我对系统了解很多，这对我来说是新的.预先感谢Jaro.

I do daily Magento development from its beginnig so I know a lot about system and this is new for me. Thanks in advance, Jaro.

推荐答案

有趣.虽然这两种方法都会为您提供一个具有完全加载的EAV数据的单个产品模型实例(前提是未传递或不提供loadByAttribute()的第三个参数)，但是添加库存相关数据的观察者对于产品与产品而言是不同的集合，但两个库存信息对象都已添加到产品数据键"stock_item".这值得商bat，但这感觉像是个错误.我认为Mage_CatalogInventory_Model_Observer::saveInventoryData()或Mage_CatalogInventory_Model_Observer::_prepareItemForSave()可以解决这个问题.

Interesting. While both methods will net you a single product model instance with fully loaded EAV data (provided the third parameter of loadByAttribute() is not passed or is *), the observers which add stock-related data are different for products vs. product collections, yet both stock information objects are added to the product data key "stock_item". It's debatable, but this feels like a bug. I would think that Mage_CatalogInventory_Model_Observer::saveInventoryData() or Mage_CatalogInventory_Model_Observer::_prepareItemForSave() would handle this.

您可以通过使用stock_item对象在您的产品实例上完全设置产品库存项目来解决此问题.

You could resolve this issue by setting the product stock item fully on your product instance using the stock_item object.

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