Update cart item price after collect totals magento2

Question

I'm trying to update cart item price depends on quote grand total. I've made an observer to change price before cart is saved. My problem is that values for changed items are changed in wrong time. Example:

I have two items in cart #1 Item - $150, #2 Item - $10, when I change qty ot first item total of this item is set to $300 (it's ok), however price of #2 Item is changed to 0 (it's ok) but in database I still see price, base_price, row_total, base_row_total, price_incl_tax, base_price_incl_tax, row_total_incl_tax, base_row_incl_tax with $10 values. When I again change qty of #1 Item, #2 Item changes price to $10 but values in database are now set to 0. Where and how should I change price to have correct data in database? Here is my code:

events.xml:

<event name="checkout_cart_save_before">
    <observer name="Vendor::save_cart” instance="Vendor\Observer\BeforeCartSaveObserver" shared="false"/>
</event>

Observer:

public function execute(\Magento\Framework\Event\Observer $observer)
{
    $cart = $observer->getCart();

    $quote = $this->checkoutSession->getQuote();

    $quote->collectTotals();
    $quote->setTotalsCollectedFlag(false);

    foreach ($quote->getAllVisibleItems() as $item) {
        $product = $item->getProduct();
        if (!$product->getIsFree()) {
            continue;
        }

        $freeItem = $item;
        break;
    }

    if ($quote->getGrandTotal() > 240) {
        $item->setCustomPrice(0)
            ->setOriginalCustomPrice(0)
            ->getProduct()->setIsSuperMode(true);
    } else {
        $product = $freeItem->getProduct();
        $defaultProductPrice = $product->getPriceInfo()
            ->getPrice('regular_price')
            ->getAmount()
            ->getBaseAmount();
        $item->setConvertedPrice($defaultProductPrice)
            ->setCustomPrice($defaultProductPrice)
            ->setOriginalCustomPrice($defaultProductPrice);

        $item->setPrice($defaultProductPrice)->setBaseOriginalPrice($item->getProduct()->getPrice());
    }
        $item->calcRowTotal();

    return $this;
}

try remove $quote->setTotalsCollectedFlag(false); or call $quote->collectTotals(); after you changed price — AlexanderPop, Jan 17 '20 at 22:02
Thank you @AlexanderPop, you saved me.. $quote->setTotalsCollectedFlag(false); this bit was the critical part. — nuwaus, Apr 24 '21 at 08:06
@nuwaus good. Glad it was useful. Added as answer. please mark it as useful if it helped you — AlexanderPop, Apr 25 '21 at 16:48

score 1 · Answer 1 · answered Apr 25 '21 at 16:46

1

try remove $quote->setTotalsCollectedFlag(false); or call $quote->collectTotals(); after you changed price. I see it helped some people

answered Apr 25 '21 at 16:46

AlexanderPop

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Update cart item price after collect totals magento2

1 Answers1