Question

这是我需要的：在文件vendor / magento / module-sales-rule / Model / Rule / Action / Discount / CartFixed.php文件中，有一个公共函数计算我想在此函数中注释一个If条件，而不修改此核心文件。

如果（$ availableDiscountAmount> 0）{

我已经在自定义模块中创建了一个首选项，但是它没有按预期工作。如果有人可以帮助我，我真的很感激。

Answer 1

要自定义Magento核心文件，可以使用首选项或Plugin。这里有更多细节

根据您的情况，可以将首选项用作以下步骤：

在di.xml中，您可以添加参考配置：

<preference for="Magento\SalesRule\Model\Rule\Action\Discount\CartFixed" type="Training\Test\Model\Rule\Action\Discount\CartFixed" />

创建Training \ Test \ Model \ Rule \ Action \ Discount \ CartFixed.php：

@作者Bach Lee * /

命名空间Training \ Test \ Model \ Rule \ Action \ Discount;

使用Magento \ Framework \ App \ ObjectManager; 使用Magento \ Framework \ Pricing \ PriceCurrencyInterface; 使用Magento \ SalesRule \ Model \ DeltaPriceRound; 使用Magento \ SalesRule \ Model \ Validator; 使用Magento \ SalesRule \ Model \ Rule \ Action \ DiscountFactory;

CartFixed类扩展了\ Magento \ SalesRule \ Model \ Rule \ Action \ Discount \ CartFixed { / ** * @var字符串 * / 私人静态$ discountType ='CartFixed'; / ** * @var DeltaPriceRound * / 私人$ deltaPriceRound;

/**
 * @param Validator $validator
 * @param DataFactory $discountDataFactory
 * @param PriceCurrencyInterface $priceCurrency
 * @param DeltaPriceRound $deltaPriceRound
 */
public function __construct(
    Validator $validator,
    DataFactory $discountDataFactory,
    PriceCurrencyInterface $priceCurrency,
    DeltaPriceRound $deltaPriceRound = null
) {
    $this->deltaPriceRound = $deltaPriceRound ?: ObjectManager::getInstance()->get(DeltaPriceRound::class);

    parent::__construct($validator, $discountDataFactory, $priceCurrency, $deltaPriceRound);
}

/**
 * @param \Magento\SalesRule\Model\Rule $rule
 * @param \Magento\Quote\Model\Quote\Item\AbstractItem $item
 * @param float $qty
 * @return \Magento\SalesRule\Model\Rule\Action\Discount\Data
 * @throws \Magento\Framework\Exception\LocalizedException
 */
public function calculate($rule, $item, $qty)
{
    /** @var \Magento\SalesRule\Model\Rule\Action\Discount\Data $discountData */
    $discountData = $this->discountFactory->create();

    $ruleTotals = $this->validator->getRuleItemTotalsInfo($rule->getId());

    $quote = $item->getQuote();
    $address = $item->getAddress();

    $itemPrice = $this->validator->getItemPrice($item);
    $baseItemPrice = $this->validator->getItemBasePrice($item);
    $itemOriginalPrice = $this->validator->getItemOriginalPrice($item);
    $baseItemOriginalPrice = $this->validator->getItemBaseOriginalPrice($item);

    /**
     * prevent applying whole cart discount for every shipping order, but only for first order
     */
    if ($quote->getIsMultiShipping()) {
        $usedForAddressId = $this->getCartFixedRuleUsedForAddress($rule->getId());
        if ($usedForAddressId && $usedForAddressId != $address->getId()) {
            return $discountData;
        } else {
            $this->setCartFixedRuleUsedForAddress($rule->getId(), $address->getId());
        }
    }
    $cartRules = $address->getCartFixedRules();
    if (!isset($cartRules[$rule->getId()])) {
        $cartRules[$rule->getId()] = $rule->getDiscountAmount();
    }

    $availableDiscountAmount = (float)$cartRules[$rule->getId()];
    $discountType = self::$discountType . $rule->getId();

    $store = $quote->getStore();
    if ($ruleTotals['items_count'] <= 1) {
        $quoteAmount = $this->priceCurrency->convert($availableDiscountAmount, $store);
        $baseDiscountAmount = min($baseItemPrice * $qty, $availableDiscountAmount);
        $this->deltaPriceRound->reset($discountType);
    } else {
        $ratio = $baseItemPrice * $qty / $ruleTotals['base_items_price'];
        $maximumItemDiscount = $this->deltaPriceRound->round(
            $rule->getDiscountAmount() * $ratio,
            $discountType
        );

        $quoteAmount = $this->priceCurrency->convert($maximumItemDiscount, $store);

        $baseDiscountAmount = min($baseItemPrice * $qty, $maximumItemDiscount);
        $this->validator->decrementRuleItemTotalsCount($rule->getId());
    }

    $baseDiscountAmount = $this->priceCurrency->round($baseDiscountAmount);

    $availableDiscountAmount -= $baseDiscountAmount;
    $cartRules[$rule->getId()] = $availableDiscountAmount;
    if ($availableDiscountAmount <= 0) {
        $this->deltaPriceRound->reset($discountType);
    }

    $discountData->setAmount($this->priceCurrency->round(min($itemPrice * $qty, $quoteAmount)));
    $discountData->setBaseAmount($baseDiscountAmount);
    $discountData->setOriginalAmount(min($itemOriginalPrice * $qty, $quoteAmount));
    $discountData->setBaseOriginalAmount($this->priceCurrency->round($baseItemOriginalPrice));
    $address->setCartFixedRules($cartRules);

    return $discountData;
}

}

或者您可以在cweagans/composer-patches之后使用this question编辑核心Magento文件

致谢

Answer 2

像这样使用

code / Magento / *核心文件中需要的任何名称或模块如果您需要更多详细信息，请让我知道它就像Magento 1一样，但是只更改了文件夹

Answer 3

应用程序/代码/ Magento / SalesRule /模型/ *

请这样使用

Answer 4

添加此命令后，请使用编译命令

Answer 5

对我有用，对您也有用

首先添加文件夹 App / Code / Magento / SalesRule / model / folder / file.php

感谢使用setup：grade 比命令setup：di：compile

问候纳西姆

Magento2：更新核心文件中的一行代码

5 个答案: