Magento 2 - New product added to cart has subtotal price value of 0

Question

I created a new product programmatically and added it to the cart, but the subtotal value which is showing in the cart is 0.

use \Magento\Catalog\Model\ProductFactory;
use \Magento\Catalog\Api\ProductRepositoryInterface;

...

    /**
     * @var \Magento\Catalog\Model\ProductFactory
     */
    protected $productFactory;

    /**
     * @var \Magento\Catalog\Api\ProductRepositoryInterface
     */
    protected $productRepository;

...

    public function __construct(
        ProductFactory $productFactory,
        ProductRepositoryInterface $productRepository,
    ) {
        $this->productFactory = $productFactory;
        $this->productRepository = $productRepository;
    }

...

$product = $this->productFactory->create();
$product->setName($data["name"]);
$product->setSku($data["sku"]);
$product->setPrice($data["difference"]);
$product->setTypeId("virtual");
$product->setWeight(0);
$product->setTaxClassId($this->taxClassId);
$product->setVisibility(1);

try {
    $product = $this->productRepository->save($product);
} catch (CouldNotSaveException $e) {
    $this->logger->info("CouldNotSaveException : ". $e->getMessage());
} catch (InputException $e) {
    $this->logger->info("InputException: " . $e->getMessage());
} catch (StateException $e) {
    $this->logger->info("StateException: ". $e->getMessage());
}

...

$this->quote->addProduct($product);
$this->quote->save();

Answer 1

Add $this->quote->collectTotals(); before quote save. You need to recalculate totals (including subtotal) after adding product to quote.

UPDATE: before collectTotals add

$shippingAddress = $quote->getShippingAddress();
$shippingAddress->setCollectShippingRates(true)
       ->collectShippingRates();

Even if no shipping address is there, it will recalculate.

Answer 2

Could be due to manu thing, your issue need more information.

Things that come up to my mind

• Price is a complex object, so may be your $data['difference"] doesn't have the good type meaning what you set on the object isn't good.

• You might have some after product save observer that might change the price

• It might just be a frontend issue with the price not showing properly.

You might first want to check the price of the quote in your database to know if the issue is in the printing process or in the saving process.

I also notice that this product is virtual. You might have some special rules for non simple products like this one.