扩展 Magento OnePage 结帐类

Question

我正在通过新模块向 Magento 结帐中添加一个额外的复选框字段，用于订阅时事通讯。

到目前为止，我已将代码添加到我的布局文件（billing.phtml）中：

<p>Please untick this box if you do not wish to receive infrequent email updates and newsletters from us. <input type="checkbox" name="billing[is_subscribed]" title="" value="1" id="billing:is_subscribed" class="checkbox" checked="checked" /></p>

我已经扩展了该类（app/code/local/Clientname/Checkout/Model/Type/Onepage.php） - I仅扩展了 savebilling 方法：

<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to [email protected] so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Checkout
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * One page checkout processing model
 */

class Eatyourwords_Checkout_Model_Type_Onepage extends Mage_Checkout_Model_Type_Onepage
{

    public function saveBilling($data, $customerAddressId)
    {
        if (empty($data)) {
            return array('error' => -1, 'message' => $this->_helper->__('Invalid data.'));
        }

        $address = $this->getQuote()->getBillingAddress();

        if (!empty($customerAddressId)) {
            $customerAddress = Mage::getModel('customer/address')->load($customerAddressId);
            if ($customerAddress->getId()) {
                if ($customerAddress->getCustomerId() != $this->getQuote()->getCustomerId()) {
                    return array('error' => 1,
                        'message' => $this->_helper->__('Customer Address is not valid.')
                    );
                }
                $address->importCustomerAddress($customerAddress);
            }
        } else {
            // process billing address and validate form
            /* @var $addressForm Mage_Customer_Model_Form */
            $addressForm    = Mage::getModel('customer/form');
            $addressForm->setFormCode('customer_address_edit')
                ->setEntity($address)
                ->setEntityType('customer_address')
                ->setIsAjaxRequest(Mage::app()->getRequest()->isAjax());
            // emulate request object
            $addressData    = $addressForm->extractData($addressForm->prepareRequest($data));
            $addressErrors  = $addressForm->validateData($addressData);
            if ($addressErrors !== true) {
                return array('error' => 1, 'message' => $addressErrors);
            }
            $addressForm->compactData($addressData);

            if (!empty($data['save_in_address_book'])) {
                $address->setSaveInAddressBook(1);
            }
        }

        // validate billing address
        if (($validateRes = $address->validate()) !== true) {
            return array('error' => 1, 'message' => $validateRes);
        }

        $address->implodeStreetAddress();

        if (true !== ($result = $this->_validateCustomerData($data))) {
            return $result;
        }

        if (!$this->getQuote()->getCustomerId() && self::METHOD_REGISTER == $this->getQuote()->getCheckoutMethod()) {
            if ($this->_customerEmailExists($address->getEmail(), Mage::app()->getWebsite()->getId())) {
                return array('error' => 1, 'message' => $this->_customerEmailExistsMessage);
            }
        }

        if (!$this->getQuote()->isVirtual()) {
            /**
             * Billing address using otions
             */
            $usingCase = isset($data['use_for_shipping']) ? (int)$data['use_for_shipping'] : 0;

            switch($usingCase) {
                case 0:
                    $shipping = $this->getQuote()->getShippingAddress();
                    $shipping->setSameAsBilling(0);
                    break;
                case 1:
                    $billing = clone $address;
                    $billing->unsAddressId()->unsAddressType();
                    $shipping = $this->getQuote()->getShippingAddress();
                    $shippingMethod = $shipping->getShippingMethod();
                    $shipping->addData($billing->getData())
                        ->setSameAsBilling(1)
                        ->setShippingMethod($shippingMethod)
                        ->setCollectShippingRates(true);
                    $this->getCheckout()->setStepData('shipping', 'complete', true);
                    break;
            }
        }

        $this->getQuote()->collectTotals();

        if (isset($data['is_subscribed'])) {
            $status = Mage::getModel(‘newsletter/subscriber’)->subscribe($data['email']);
        }

        $this->getQuote()->save();

        $this->getCheckout()
            ->setStepData('billing', 'allow', true)
            ->setStepData('billing', 'complete', true)
            ->setStepData('shipping', 'allow', true);

        return array();
    }

}

特别是在我插入的类的底部：

if (isset($data['is_subscribed'])) {
            $status = Mage::getModel(‘newsletter/subscriber’)->subscribe($data['email']);
        }

我添加了一个文件来让 Magento 了解该模块（app/etc/modules/Clientname_Checkout.xml）：

<?xml version="1.0"?>

<config>
    <modules>
        <Clientname_Checkout>
            <active>true</active>
            <codePool>local</codePool>
        </Clientname_Checkout>
    </modules>
</config>

但是我现在被困在我如何让 Magento 识别并使用我扩展的替代 save_billing 方法的最后一步。我想我需要添加一个文件 /app/code/local/Clientname/config.xml。

但我不明白如何设置它以便使用新的 savebilling 类而不是原始类。

请问有人可以帮忙完成这最后一步吗？

谢谢西蒙

​

Answer 1

这是 Magento 中类覆盖的教科书示例。您可能知道，Magento 使用一种抽象形式根据代码库中散布的 XML 配置文件的内容来加载类。这意味着我们可以通过调用 Mage::getModel('checkout/type_onepage') 使用默认配置来加载模型 Mage_Checkout_Model_Type_Onepage。一个非常酷的功能是能够修改模型引用 checkout/type_onepage 到实际类名称的映射。

目录结构

所以您已经完成了艰苦的工作：编辑模板并更改模型方法。接下来，您需要构建一个小模块来执行类重写。根据类的名称，您将需要以下形式的目录结构：

/app
  /etc
    /modules
      /Eatyourwords_Checkout.xml
  /code
    /local
      /Eatyourwords
        /Checkout
          /etc
            /config.xml
          /Model
            /Type
              /Onepage.php

执行重写

重写是在模块配置文件 config.xml 中处理的：

<?xml version="1.0" encoding="UTF-8"?>
<config>
    <modules>
        <eyw_c>
            <version>1.0</version>
        </eyw_c>
    </modules>
    <global>
        <models>
            <eyw_c>Eatyourwords_Checkout_Model</eyw_c>
            <checkout>
                <rewrite>
                    <type_onepage>Eatyourwords_Checkout_Model_Type_Onepage</type_onepage>
                </rewrite>
            </checkout>
        </models>
    </global>
</config>

< code>标签组只是模块的一些标准引导。

在 部分中，我们定义加载任何模型类时要使用的命名空间。与 checkout/type_onepage 非常相似，我们可以通过附加 eyw_c/* 来访问 /Model 目录中的任何模型。

然后，我们打开 Mage_Checkout 模型命名空间 ，并重写 checkout/type_onepage 类。现在，当 Magento 尝试加载 checkout/type_onepage 时，它会查找我们的类。所有其他 checkout/* 类将不受影响。它们的类名将以正常方式构造。

启用模块

接下来我们需要将 Magento 指向我们创建的新模块。你的尝试几乎是正确的。您应该将其命名为 Eatyourwords_Checkout.xml 并将其放置在 /app/etc/modules 中：

<?xml version="1.0"?>
<config>
    <modules>
        <Eatyourwords_Checkout>
            <active>true</active>
            <codePool>local</codePool>
            <depends>
                <Mage_Checkout />
            </depends>
        </Eatyourwords_Checkout>
    </modules>
</config>

..就这样完成了。类被覆盖。