在保存付款方式之前如何获取报价总额？

Question

我正在尝试创建一步结帐，但在结帐页面中我遇到了订单审核部分的问题。当我选择一种付款方式时，例如“货到付款”有 5 美元的额外费用，或者“支票订单”有 %4 的折扣或“信用卡付款”会在订单总额中增加额外费用。 在保存付款方式之前，我需要一种方法来计算折扣。有什么建议吗？

Answer 1

因为我们谈论的是 Magento，所以有几种方法可以做到这一点。实现该功能的最佳方式是为折扣或额外费用创建您自己的总模型。

如何创建自定义 Magento 总模型

要创建自己的总模型，您首先需要创建一个模块，并将总模型添加到配置中。

<global>
  <sales>
    <quote>
      <totals>
        <your_total>
          <class>your_module/quote_address_total_yourTotal</class>
          <after>shipping</after><!-- calculate after these total models -->
          <before>grand_total,tax</before><!-- calculate before these total models -->
        </your_total>
      </totals>
    </quote>
    <order_invoice>
      <totals>
        <your_total>
          <class>your_module/order_invoice_total_yourTotal</class>
          <after>shipping</after>
          <before>grand_total,tax</before>
        </your_total>
      </totals>
    </order_invoice>
    <order_creditmemo>
      <totals>
        <your_total>
          <class>your_module/order_creditmemo_total_yourTotal</class>
          <after>shipping</after>
          <before>grand_total,tax</before>
        </your_total>
      </totals>
    </order_creditmemo>
  </sales>
  <pdf>
    <totals>
      <your_total translate="title">
        <title>Your Total</title>
        <source_field>your_total</source_field>
        <font_size>7</font_size>
        <display_zero>0</display_zero>
        <sort_order>450</sort_order>
      </your_total>
    </totals>
  </pdf>
</global>

然后实现 XML 中指定的三个类。
报价地址总数需要扩展sales/quote_address_total_abstract，实现collect()和fetch()两种方法。

class Your_Module_Model_Quote_Address_Total_YourTotal
    extends Mage_Sales_Model_Quote_Address_Total_Abstract
{
    // Calculate your total value
    public function collect(Mage_Sales_Model_Quote_Address $address)
    {
        parent::collect($address);

        // Calculate the totals based on the information in the $address
        // and the $address->getQuote()
        // To get the items in the cart use $address->getAllItems()
        // To get the payment method use getPayment()->getMethodInstance()
        // etc

        // When your totals are known..
        $this->_addAmount($total); // store view currency amount
        $this->_addBaseAmount($baseTotal); // base currency amount

        // Also store in address for later reference in fetch()
        $address->setMyTotal($total);
        $address->setBaseMyTotal($baseTotal);

        return $this;
    }

    // If the total should be displayed in the cart and the checkout
    // add them to the address model here, otherwise just return
    // (it will still be calculated and added to the grand total)
    public function fetch(Mage_Sales_Model_Quote_Address $address)
    {
        if ($address->getMyTotal() > 0)
        {
            $address->addTotal(array(
                'code'  => $this->getCode(),
                'title' => Mage::helper('your_module')->__('Your Total'),
                'value' => $address->getMyTotal()
            ));
        }
        return $this;
    }
}

配置 XML 中指定的下一个类是发票总模型 your_module/order_invoice_total_yourTotal。

class Your_Module_Model_Order_Invoice_Total_YourTotal
    extends Mage_Sales_Model_Order_Invoice_Total_Abstract
{
    // Collect the totals for the invoice
    public function collect(Mage_Sales_Model_Order_Invoice $invoice)
    {
        $order = $invoice->getOrder();
        $myTotal = $order->getMyTotal();
        $baseMyTotal = $order->getBaseMyTotal();

        $invoice->setGrandTotal($invoice->getGrandTotal() + $myTotal);
        $invoice->setBaseGrandTotal($invoice->getBaseGrandTotal() + $basemyTotal);

        return $this;
    }
}

creditmemo总模型中需要实现的最后一个类，和invoice总模型一样，只是它扩展了抽象类Mage_Sales_Model_Order_Creditmemo_Total_Abstract。

您还需要使用设置脚本添加属性：

/**
 * @var Mage_Sales_Model_Resource_Setup $installer
 */
$installer = Mage::getResourceModel('sales/setup', 'default_setup');

$installer->startSetup();

$installer->addAttribute('order', 'base_your_total', array(
    'label' => 'Base Your Total',
    'type'  => 'decimal',
));

$installer->addAttribute('order', 'your_total', array(
    'label' => 'Your Total',
    'type'  => 'decimal',
));

$installer->addAttribute('invoice', 'base_your_total', array(
    'label' => 'Base Your Total',
    'type'  => 'decimal',
));

$installer->addAttribute('invoice', 'your_total', array(
    'label' => 'Your Total',
    'type'  => 'decimal',
));

$installer->addAttribute('creditmemo', 'base_your_total', array(
    'label' => 'Base Your Total',
    'type'  => 'decimal',
));

$installer->addAttribute('creditmemo', 'your_total', array(
    'label' => 'Your Total',
    'type'  => 'decimal',
));

$installer->endSetup();

为了在管理区域中显示新的总计，您需要使用布局 XML 为其添加总计块。为模块中的adminhtml 区域注册一个布局更新文件。这是一个示例内容：

<layout version="0.1.0">

  <adminhtml_sales_order_view>
    <reference name="order_totals">
      <block type="your_module/sales_total_yourTotal" name="total_your_total" as="your_total"/>
    </reference>
  </adminhtml_sales_order_view>

  <adminhtml_sales_order_invoice_new>
    <reference name="invoice_totals">
      <block type="your_module/sales_total_yourTotal" name="total_your_total" as="your_total"/>
    </reference>
  </adminhtml_sales_order_invoice_new>

  <adminhtml_sales_order_invoice_updateqty>
    <reference name="invoice_totals">
      <block type="your_module/sales_total_yourTotal" name="total_your_total" as="your_total"/>
    </reference>
  </adminhtml_sales_order_invoice_updateqty>

  <adminhtml_sales_order_invoice_view>
    <reference name="invoice_totals">
      <block type="your_module/sales_total_yourTotal" name="total_your_total" as="your_total"/>
    </reference>
  </adminhtml_sales_order_invoice_view>

  <adminhtml_sales_order_creditmemo_new>
    <reference name="creditmemo_totals">
      <block type="your_module/sales_total_yourTotal" name="total_your_total" as="your_total"/>
    </reference>
  </adminhtml_sales_order_creditmemo_new>

  <adminhtml_sales_order_creditmemo_view>
    <reference name="creditmemo_totals">
      <block type="your_module/sales_total_yourTotal" name="total_your_total" as="your_total"/>
    </reference>
  </adminhtml_sales_order_creditmemo_view>

</layout>

如果您不想在某处显示您的总数，只需将其省略即可。它仍然会被计算。 好的，差不多了。最后，admin area总块类实现：

// Many ways to implement this, here is one option
class Your_Module_Block_Sales_Total_YourTotal
    extends Mage_Core_Block_Abstract
{
    public function initTotals()
    {
        $parent = $this->getParentBlock();

        $value = $parent->getSource()->getMyTotal();

        if ($value > 0)
        {
            $total = new Varien_Object(array(
            'code'  => 'my_total',
            'value' => $parent->getSource()->getMyTotal(),
            'base_value' => $parent->getSource()->getBaseMyTotal(),
            'label' => $this->__('My Total'),
            'field' => 'my_total'
            ));
            $parent->addTotal($total, 'my_total');
        }
        return $this;
    }
}

现在唯一缺少的是将总金额从报价地址复制到订单，从订单复制到发票和贷项备忘录的字段集。将以下 XML 添加到 config.xml：

<fieldsets>
    <sales_convert_quote_address>
        <shipping_surcharge><to_order>*</to_order></shipping_surcharge>
        <base_shipping_surcharge><to_order>*</to_order></base_shipping_surcharge>
    </sales_convert_quote_address>
    <sales_convert_order>
        <shipping_surcharge><to_invoice>*</to_invoice><to_cm>*</to_cm></shipping_surcharge>
    </sales_convert_order>
</fieldsets>

就是这样。总数将显示在任何地方（包括生成的 PDF）。
正如我所说，还有许多其他方法可以简单地更新核心中已经存在的全部模型的值，但这是实现它的完整方法。

Answer 2

订单有setShippingAmount 和getShippingAmount 方法。修改以添加“货到付款”。

创建一个方法并将其作为观察者添加到/etc/config.xml 中的checkout_type_onepage_save_order 事件

# file: /Model/Observer.php
<?php
    class Handling_Fee_Model_Observer 
    {
       public function updateHandling ($observer)
       {
          $order = $observer->getEvent()->getOrder();
          $shipping_amount = $order->getShippingAmount();
          $order->setShippingAmount($shipping_amount * (1 + 0,5));
          return $this;
       }
    }

这是您问题的一部分。在我看来，您可以通过这种方式自定义左侧部分。