Magento 2: How to change Weight field for DHL Shipping Method [SOLVED]

Question

For Product apart from Magento Field Weight, we have another Attribute Called

Total Weight.

Every product has this attribute. So when user will select DHL Shipping Method, instead of Product's weight field I need to use my Total Weight attribute.

How to achieve this? Need to override from

magento\vendor\magento\module-dhl\Model\Carrier.php & _getAllItems() function?

Answer 1

Need to override Model

magento\app\code\Custom\Module\etc\di.xml

<preference for="Magento\Dhl\Model\Carrier" type="Custom\Module\Model\Carrier" />

magento\app\code\Custom\Module\Model\Carrier.php

namespace Custom\Module\Model;

class Carrier extends \Magento\Dhl\Model\Carrier {


    /**
     * Prepare items to pieces
     *
     * @return array
     * @SuppressWarnings(PHPMD.CyclomaticComplexity)
     * @SuppressWarnings(PHPMD.NPathComplexity)
     */
    public function _getAllItems() {
        $allItems = $this->_request->getAllItems();
        $fullItems = [];

        foreach ($allItems as $item) {
            if ($item->getProductType() == \Magento\Catalog\Model\Product\Type::TYPE_BUNDLE && $item->getProduct()->getShipmentType()) {
                continue;
            }

            $qty = $item->getQty();
            $changeQty = true;
            $checkWeight = true;
            $decimalItems = [];

            if ($item->getParentItem()) {
                if (!$item->getParentItem()->getProduct()->getShipmentType()) {
                    continue;
                }
                if ($item->getIsQtyDecimal()) {
                    $qty = $item->getParentItem()->getQty();
                } else {
                    $qty = $item->getParentItem()->getQty() * $item->getQty();
                }
            }

            $itemWeight = $item->getWeight(); // Original Weight

            // START CUSTOM CODE
            $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
            $_product = $objectManager->get('Magento\Catalog\Model\Product')->load($item->getProduct()->getId());
            $itemWeight =  $_product->getData('my_weight_attribute');
            // END CUSTOM CODE

            if ($item->getIsQtyDecimal() && $item->getProductType() != \Magento\Catalog\Model\Product\Type::TYPE_BUNDLE) {
                $productId = $item->getProduct()->getId();
                $stockItemDo = $this->stockRegistry->getStockItem($productId, $item->getStore()->getWebsiteId());
                $isDecimalDivided = $stockItemDo->getIsDecimalDivided();
                if ($isDecimalDivided) {
                    if ($stockItemDo->getEnableQtyIncrements() && $stockItemDo->getQtyIncrements()
                    ) {
                        $itemWeight = $itemWeight * $stockItemDo->getQtyIncrements();
                        //$qty = round($item->getWeight() / $itemWeight * $qty);
                        $qty = round($_product->getData('my_weight_attribute') / $itemWeight * $qty);
                        $changeQty = false;
                    } else {
                        $itemWeight = $this->_getWeight($itemWeight * $item->getQty());
                        $maxWeight = $this->_getWeight($this->_maxWeight, true);
                        if ($itemWeight > $maxWeight) {
                            $qtyItem = floor($itemWeight / $maxWeight);
                            $decimalItems[] = ['weight' => $maxWeight, 'qty' => $qtyItem];
                            $weightItem = $this->mathDivision->getExactDivision($itemWeight, $maxWeight);
                            if ($weightItem) {
                                $decimalItems[] = ['weight' => $weightItem, 'qty' => 1];
                            }
                            $checkWeight = false;
                        }
                    }
                } else {
                    $itemWeight = $itemWeight * $item->getQty();
                }
            }

            if ($checkWeight && $this->_getWeight($itemWeight) > $this->_getWeight($this->_maxWeight, true)) {
                return [];
            }

            if ($changeQty && !$item->getParentItem() && $item->getIsQtyDecimal() && $item->getProductType() != \Magento\Catalog\Model\Product\Type::TYPE_BUNDLE
            ) {
                $qty = 1;
            }

            if (!empty($decimalItems)) {
                foreach ($decimalItems as $decimalItem) {
                    $fullItems = array_merge(
                            $fullItems, array_fill(0, $decimalItem['qty'] * $qty, $decimalItem['weight'])
                    );
                }
            } else {
                $fullItems = array_merge($fullItems, array_fill(0, $qty, $this->_getWeight($itemWeight)));
            }
        }
        sort($fullItems);

        return $fullItems;
    }

}

Don't wanna use objectmanager any alternatives?