magento添加购物车总价计算实现方法

****

<**>
**/***
subtotal,freeshipping,tax_subtotal,shipping
grand_total




**/**
550

*****

public function collect(Mage_Sales_Model_Quote_Address $address){

parent::collect($address);

$items = $this->_getAddressItems($address);
if (!count($items)) {
return $this;
}

$address->setAffiliatepointsAmount(10);
$address->setGrandTotal($address->getGrandTotal() – 10);
$address->setBaseGrandTotal($address->getBaseGrandTotal()-10);

return $this;
}

public function fetch(Mage_Sales_Model_Quote_Address $address)
{
$amount = $address->getAffiliatepointsAmount();
if ($amount != 0) {
$title = Mage::helper(‘affiliate’)->__(‘Affiliate Points’);
$address->addTotal(array(
‘code’ => $this->getCode(),
‘title’ => $title,
‘value’ => -$amount
));
}

return $this;
}