[原创] Magento 动态添加或修改商品的 Custom Option

最近在 Magento 项目中有这样一种需求，在下订单时，修改该商品的 Custom Option。现列出一下解决方案：
测试时使用的 Magento 版本是 1.7.0.2。
动态修改商品的 Custom Option

$_product = $this->getProduct();
$i = 1;
foreach ($_product->getOptions() as $o) {
	echo "[b]Custom Option:" . $i . "[/b]<br/>";
	echo "Custom Option TYPE: " . $o->getType() . "<br/>";
	echo "Custom Option TITLE: " . $o->getTitle() . "<br/>";
	echo "Custom Option Values: <br/>";
// Getting Values if it has option values, case of select,dropdown,radio,multiselect
$values = $o->getValues();
	foreach ($values as $v) {
//print_r($v->getData());
	echo $v["title"] . " Sort Order: " . $v["sort_order"] . "<br/>";
$rand = rand(0, 100);
$v["sort_order"] = $rand;
$v->setOption($o)->save();
/* Or else, you can set multiple option value simultaneously.
$v->setTitle("morad")
->setSku("kk")
->setPriceType("fixed")
->setSortOrder(0)
->setPrice(floatval(13.0000));
$v->setOption($o)->save();
*/
	}
$i++;
}

动态添加商品的 Custom Option

function setCustomOption($productId, 
$title, 
                array $optionData, 
                array $values = array()) {
    Mage::app()->getStore()->setId(Mage_Core_Model_App::ADMIN_STORE_ID);
    if (!$product = Mage::getModel('catalog/product')->load($productId)) {
        throw new Exception('Can not find product: ' . $productId);
    }
$defaultData = array(
'type'          => 'field',
'is_require'    => 0,
'price'         => 0,
'price_type'    => 'fixed',
    );
$data = array_merge($defaultData, 
$optionData, 
                        array('product_id' => (int)$productId,
'title' => $title,
'values' => $values));
$product->setHasOptions(1)->save();                                     
$option = Mage::getModel('catalog/product_option')->setData($data)
->setProduct($product)->save();
    return $option;
}

使用示例：

$options =  array('type' => 'radio',
'is_require' => 1,
'price' => 0,
'price_type' => 'fixed');
$values = array(
            array(
'title' => '2kg',
'price' => 10,
'price_type' => 'fixed',
'sku' => 'w1',
'sort_order' => 1
            ),
            array(
'title' => '4kg',
'price' => 20,
'price_type' => 'fixed',
'sku' => 'w2',
'sort_order' => 2
            ),
            array(
'title' => '10kg',
'price' => 40,
'price_type' => 'fixed',
'sku' => 'w3',
'sort_order' => 3
            )
         );
setCustomOption(166, 'Weight', $options, $values);

FYI：