信用卡折扣的magento自定义价格规则

Question

我希望有人可以帮助我制定价格规则我一直遇到问题。如果有人用指定的信用卡付款，我想打折一定金额。

例如，假设我想对Visa信用卡给予一定的折扣，即如果客户使用Visa信用卡付款，他必须获得{xy}金额的折扣。

我已经尝试过这么多，我已经扩展了Mage_SalesRule_Model_Rule_Condition_Address类并添加了一个新属性，我在管理站点获得了创建规则的选项。

但问题是，当我使用信用卡签证付款并再次返回支付模式以更改模式并应用其他支付卡时，它会获取前一个信息，并对未指定的信用卡给予折扣。 我的扩展课程是：

class Alw_ManageProduct_Model_Condition_Address extends Mage_SalesRule_Model_Rule_Condition_Address
{
    public function loadAttributeOptions()
    {
        $attributes = array(
            'base_subtotal' => Mage::helper('salesrule')->__('Subtotal'),
            'total_qty' => Mage::helper('salesrule')->__('Total Items Quantity'),
            'weight' => Mage::helper('salesrule')->__('Total Weight'),
            'payment_method' => Mage::helper('salesrule')->__('Payment Method'),
            'shipping_method' => Mage::helper('salesrule')->__('Shipping Method'),
            'postcode' => Mage::helper('salesrule')->__('Shipping Postcode'),
            'region' => Mage::helper('salesrule')->__('Shipping Region'),
            'region_id' => Mage::helper('salesrule')->__('Shipping State/Province'),
            'country_id' => Mage::helper('salesrule')->__('Shipping Country'),
            'cc_type' => Mage::helper('salesrule')->__('Credit Card Type'),
        );

        $this->setAttributeOption($attributes);

        return $this;
    }

    public function getAttributeElement()
    {
        $element = parent::getAttributeElement();
        $element->setShowAsText(true);
        return $element;
    }

    public function getInputType()
    {
        switch ($this->getAttribute()) {
            case 'base_subtotal': case 'weight': case 'total_qty':
                return 'numeric';

            case 'shipping_method': case 'payment_method': case 'country_id': case 'cc_type': case 'region_id':
                return 'select';
        }
        return 'string';
    }

    public function getValueElementType()
    {
        switch ($this->getAttribute()) {
            case 'shipping_method': 
            case 'payment_method': 
            case 'country_id': 
            case 'region_id': 
            case 'cc_type' :
                return 'select';
        }
        return 'text';
    }

    public function getValueSelectOptions()
    {
        if (!$this->hasData('value_select_options')) {
            switch ($this->getAttribute()) {
                case 'country_id':
                    $options = Mage::getModel('adminhtml/system_config_source_country')
                        ->toOptionArray();
                    break;

                case 'region_id':
                    $options = Mage::getModel('adminhtml/system_config_source_allregion')
                        ->toOptionArray();
                    break;

                case 'shipping_method':
                    $options = Mage::getModel('adminhtml/system_config_source_shipping_allmethods')
                        ->toOptionArray();
                    break;

                case 'payment_method':
                    $options = Mage::getModel('adminhtml/system_config_source_payment_allmethods')
                        ->toOptionArray();
                    break;

                case 'cc_type':
                    $options = Mage::getModel('adminhtml/system_config_source_payment_cctype')
                        ->toOptionArray();
                    break;

                default:
                    $options = array();
            }
            $this->setData('value_select_options', $options);
        }
        return $this->getData('value_select_options');
    }

    /**
     * Validate Address Rule Condition
     *
     * @param Varien_Object $object
     * @return bool
     */
    public function validate(Varien_Object $object)
    {
        $address = $object;
        if (!$address instanceof Mage_Sales_Model_Quote_Address) {
            if ($object->getQuote()->isVirtual()) {
                $address = $object->getQuote()->getBillingAddress();
            }
            else {
                $address = $object->getQuote()->getShippingAddress();
            }
        }

        if ('payment_method' == $this->getAttribute() && ! $address->hasPaymentMethod()) {
            $address->setPaymentMethod($object->getQuote()->getPayment()->getMethod());
        }

        if('cc_type' == $this->getAttribute() && ! $address->hasCcType()) {
            $address->setCcType($object->getQuote()->getPayment()->getCcType());

            // validation cc type

            //echo $cct = $object->getQuote()->getPayment()->getCcType();
            //die;

            // if ($this->validateAttribute($cct)) {
            //    return true;
            //} else {
            //    return false;
            //}              

        }

        return parent::validate($address);
    }
}

请帮助我，如果有人可以......