Magento - 在观察者中更改产品自定义选项值

Question

当产品添加到购物车时，如何更改产品自定义选项值？我的伪代码 -

public function generatePreviewImage(Varien_Event_Observer $obs) { 
    // Get the order item 
    $orderItem = $obs->getOrderItem(); 

    // Get product options with values 
    $productOptions = $orderItem->getProductOptions() 

    // Set new value 
    $productOptions['options'][$index]['option_value'] = 'my new value'; 

    // Update options and save orderItem 
    $orderItem->setProductOptions($productOptions); 
    $orderItem->save(); 
} 

Answer 1

我的解决方案

// Add new info_buyRequest option 
$item = $obs->getQuoteItem(); 
$product = $item->getProduct(); 
$options = $item->getOptions(); 

foreach ($options as $option){ 
    // Select buy request options 
    if($option->getCode() == 'info_buyRequest') { 
     $infoBuyRequestOption = $option; 

     $unserializedInfoBuyRequest = unserialize($infoBuyRequestOption->getValue()); 

     // Set my new option 
     $unserializedInfoBuyRequest['preview'] = 'My new preview image'; 

     // Store new options 
     $infoBuyRequestOption->setValue(serialize($unserializedInfoBuyRequest)); 
     $item->setOptions($options)->save(); 
     Mage::getSingleton('checkout/cart')->save(); 
     break; 
    } 
} 

// And then in cart rendering view 
$preview = unserialize($this->getProduct()->getCustomOption('info_buyRequest')->getValue())['preview']; 

// In admin panel 
$preview = $_item->getProductOptionByCode('info_buyRequest')['preview'];