使用按钮添加总计自定义折扣顺序

Question

我的模块有我的自定义折扣,没关系.

config.xml文件:

<sales>
   <quote>
       <totals>
             <aver> 
                <class>Dani_Prueba_Model_Total_Aver</class> 
                <after>subtotal</after> 
             </aver>
        </totals>
    </quote>
</sales>

我的模块:

<?php
class Dani_Prueba_Model_Total_Aver extends Mage_Sales_Model_Quote_Address_Total_Abstract{

    public function collect(Mage_Sales_Model_Quote_Address $address){

        $baseDiscount = 2.5;
        $discount = Mage::app()->getStore()->convertPrice($baseDiscount);

        $address->setCustomDiscount($baseDiscount);

        $address->setBaseGrandTotal($address->getBaseGrandTotal() - $baseDiscount);
        $address->setGrandTotal($address->getGrandTotal() - $discount);

        return $this;
    }

    public function fetch(Mage_Sales_Model_Quote_Address $address){
        $this->setCode('aver');
        $amount = $address->getCustomDiscount();
            if ($amount != 0){
                $address->addTotal(array(
                'code'  => $this->getCode(),
                'title' => 'Custom Discount',
                'value' => $amount
            ));
        }
        return $this;
    }
}

这没关系,当我将产品添加到购物车时,会自动应用我的自定义折扣.

但现在我需要用一个按钮来做.当我向购物车添加产品时,不应用折扣并拥有正确的总数.但是当我点击一个按钮,应用我的自定义折扣,并使用其他按钮"取消",取消折扣.我需要一些类似功能的优惠券代码.

我怎么做的？

Answer 1

为此,您需要向表中添加另一个属性/列sales/quote(可能还有sales/order表).

因此,在您的安装脚本中,执行此操作(我还包括sales/order table/entity属性):

$installer->addAttribute('order', 'use_special_coupon', array('type' => 'int', 'grid' => true, 'source' => 'adminhtml/system_config_source_yesno'));
$installer->addAttribute('quote', 'use_special_coupon', array('type' => 'int', 'grid' => true, 'source' => 'adminhtml/system_config_source_yesno'));
$installer->getConnection()->addColumn($installer->getTable('sales/quote'), 'use_special_coupon', 'TINYINT(1) unsigned default 0');
$installer->getConnection()->addColumn($installer->getTable('sales/order'), 'use_special_coupon', 'TINYINT(1) unsigned default 0');

然后,在您的控制器中,执行以下操作:

$quote = Mage::getSingleton('checkout/session')->getQuote();
$quote
    ->setUseSpecialCoupon(true)
    ->save();

或者,在你的removeAction中相反:

$quote = Mage::getSingleton('checkout/session')->getQuote();
$quote
    ->setUseSpecialCoupon(false)
    ->save();

然后,最后,在您的整个模型中,将其修改为:

<?php
class Dani_Prueba_Model_Total_Aver extends Mage_Sales_Model_Quote_Address_Total_Abstract{

    public function collect(Mage_Sales_Model_Quote_Address $address)
    {
        if ($address->getQuote()->getUseSpecialCoupon()) {
            $baseDiscount = 2.5;
            $discount = Mage::app()->getStore()->convertPrice($baseDiscount);

            $address->setCustomDiscount($baseDiscount);

            $address->setBaseGrandTotal($address->getBaseGrandTotal() - $baseDiscount);
            $address->setGrandTotal($address->getGrandTotal() - $discount);
        }
        return $this;
    }

    public function fetch(Mage_Sales_Model_Quote_Address $address){
        if ($address->getQuote()->useSpecialCoupon()) {            
            $this->setCode('aver');
            $amount = $address->getCustomDiscount();
            if ($amount != 0){
                $address->addTotal(array(
                    'code'  => $this->getCode(),
                    'title' => 'Custom Discount',
                    'value' => $amount
                ));
            }
        }
        return $this;
    }
}