Magento2前端销售订单查看页添加自定义Tab报错咨询

报错Call to a member function getRealOrderId() on null的根因是：你用到的Magento\Sales\Block\Order\Info块依赖系统注册表中预加载的订单对象，你的自定义控制器没有完成订单的校验和注入逻辑，导致块读取订单对象为空。

按照以下步骤修改即可解决：

1. 修正自定义控制器逻辑 #

替换Controller/Index/Index.php代码，增加订单读取、权限校验、注册到系统注册表的逻辑：

<?php
namespace Infopro\CustomSection\Controller\Index;

use Magento\Framework\App\Action\Context;
use Magento\Framework\Registry;
use Magento\Sales\Model\OrderFactory;
use Magento\Customer\Model\Session as CustomerSession;
use Magento\Framework\Controller\Result\ForwardFactory;

class Index extends \Magento\Framework\App\Action\Action
{
    protected $registry;
    protected $orderFactory;
    protected $customerSession;
    protected $forwardFactory;

    public function __construct(
        Context $context,
        Registry $registry,
        OrderFactory $orderFactory,
        CustomerSession $customerSession,
        ForwardFactory $forwardFactory
    ) {
        $this->registry = $registry;
        $this->orderFactory = $orderFactory;
        $this->customerSession = $customerSession;
        $this->forwardFactory = $forwardFactory;
        parent::__construct($context);
    }

    public function execute()
    {
        $orderId = $this->getRequest()->getParam('order_id');
        if (!$orderId) {
            return $this->forwardFactory->create()->forward('noroute');
        }

        $order = $this->orderFactory->create()->load($orderId);
        // 校验订单归属，防止越权访问
        if (!$order->getId() || $order->getCustomerId() != $this->customerSession->getCustomerId()) {
            return $this->forwardFactory->create()->forward('noroute');
        }

        // 注册订单到系统注册表，供订单相关块读取
        $this->registry->register('current_order', $order);

        $this->_view->loadLayout();
        $this->_view->renderLayout();
    }
}

2. 修正Tab跳转链接传参 #

修改sales_order_info_links.xml，给链接块增加自动携带订单ID的配置，保证跳转时会带上当前订单的order_id参数：

<?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
    <body>
        <referenceBlock name="sales.order.info.links">
            <block class="Magento\Sales\Block\Order\Link" name="sales.order.info.links.new.tab">
                <arguments>
                    <argument name="key" xsi:type="string">tab_new</argument>
                    <argument name="path" xsi:type="string">subscription/index/index</argument>
                    <argument name="label" xsi:type="string" translate="true">Tab Label</argument>
                    <!-- 新增以下配置，自动拼接订单ID参数 -->
                    <argument name="order" xsi:type="object">Magento\Sales\Model\Order</argument>
                </arguments>
            </block>
        </referenceBlock>
      </body>
</page>

3. 自定义phtml获取订单信息（可选） #

如果你的tab.phtml需要调用订单数据，建议将对应块的类替换为Magento\Sales\Block\Order\Info，就可以直接调用$block->getOrder()获取订单实例。修改subscription_index_index.xml中对应块的配置：

<referenceContainer name="content">
    <block class="Magento\Sales\Block\Order\Info" name="tab_custom" template="Infopro_CustomSection::tab.phtml"/>
</referenceContainer>

之后在tab.phtml中就可以正常调用订单方法，例如：

<?php $order = $block->getOrder(); ?>
<p>订单号：<?= $order->getRealOrderId() ?></p>
<p>下单时间：<?= $order->getCreatedAt() ?></p>

修改完成后执行bin/magento cache:clean清理缓存即可正常访问。

内容的提问来源于stack exchange，提问作者Soumyo Deepto