Question

我需要从\ Magento \ Checkout \ Model \ Cart覆盖updateItems函数还需要在__construct arguments中传递我的自定义帮助程序类。这是我的重写类的__construct函数

namespace Vendor\Module\Model;
use Magento\Catalog\Api\ProductRepositoryInterface;
use Magento\Checkout\Model\Session;
Class Cart extends \Magento\Checkout\Model\Cart
{
public function __construct(\Magento\Framework\Event\ManagerInterface $eventManager,
                            \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
                            \Magento\Store\Model\StoreManagerInterface $storeManager,
                            \Magento\Checkout\Model\ResourceModel\Cart $resourceCart, Session $checkoutSession, \Magento\Customer\Model\Session $customerSession, \Magento\Framework\Message\ManagerInterface $messageManager, \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry, \Magento\CatalogInventory\Api\StockStateInterface $stockState, \Magento\Quote\Api\CartRepositoryInterface $quoteRepository, ProductRepositoryInterface $productRepository,
                            \Vendor\Module\Helper\Data $helper, array $data = []
                            )
{
    $this->helper = $helper;
    parent::__construct($eventManager, $scopeConfig, $storeManager, $resourceCart, $checkoutSession, $customerSession, $messageManager, $stockRegistry, $stockState, $quoteRepository, $productRepository, $data);

}
}

此后，我运行setup：upgrade，compile，static内容部署命令。还要删除var中的所有文件夹。但是当我在__construct函数中传递参数时。它不起作用。它显示空白页。当我从__construct函数中删除参数时。然后页面正在加载。

Answer 1

如果您想从结帐购物车模型类中覆盖@Injectable() export class SomethingResolver implements Resolve<Action> { constructor ( private store: Store<State>, private action$: Actions ) {} resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<Action> { this.store.dispatch({ type: Actions.FETCH_SOMETHING }); const responseOK = this.action$.ofType(Actions.RESPONSE_OK); const responseError = this.action$.ofType(Actions.RESPONSE_ERROR) .do(() => this.router.navigate(['']); return Observable.race(responseOk, responseError).take(1); } }，则必须在模块updateItems文件中添加preference，如下所示：

di.xml

然后，您的自定义模块<?xml version="1.0"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd"> <preference for="Magento\Checkout\Model\Cart" type="[Vendor_Name]\[Module_Name]\Model\Cart" /> </config>应该如下所示：

app/code/[Vendor_Name]/[Module_Name]/Model/Cart.php

然后编译依赖项，仅此而已。阅读本文以了解有关Overriding classes in Magento 2

的更多信息

Magento 2 Override Magento Checkout模型购物车updateItems函数

1 个答案: