在保存付款方式之前如何获得报价总额？

Question

我想创建一步结帐,但在结帐页面我有订单审查部分的问题.当我选择付款方式时,例如"货到付款"有5美元额外,或"checkorder"有%4折扣或"信用卡付款"增加订单总额额外.在保存付款方式之前,我需要一种计算折扣的方法.有什么建议吗？

Answer 1

因为我们在讨论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,首先需要创建模块,然后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.
引用地址总需要扩展sales/quote_address_total_abstract和实现这两种方法collect()和fetch().

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计模型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;
    }
}

您需要在creditmemo总模型中实现的最终类,就像发票总模型一样,只是它扩展了抽象类Mage_Sales_Model_Order_Creditmemo_Total_Abstract.

您还需要使用安装脚本添加属性:

/**
 * @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();

要在管理区域中显示新总计,您需要使用布局XML为其添加总计块.注册adminhtml模块中区域的布局更新文件.以下是示例内容:

<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,请将其删除.它仍将被计算.好的,差不多了.最后,管理区域总块类实现:

// 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;
    }
}

现在唯一缺少的是字段集,用于将总金额从报价地址复制到订单,从订单复制到发票和creditmemo.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.总数将随处显示(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存在的总模型的值,但这是实现它的全面方式.