Check if product is already in cart

Question

Magento 2.3.3

Store is strictly downloadable mp3 products. Thus max quantity for each product is one (adding more than one would not make sense). I'd like to check if a product is already in the cart, and if so, I'll hide the Add to Cart button.

(Current default behavior is that if the product is already in the cart, clicking the button sends you to the product page with an error message. I'd like to skip this.)

I've found this, but it doesn't work:

How to check whether a product is in the cart?

The $productInfo array in the above example is empty, even when there are items in the cart.

This also did not help me: how to check if product is already in cart

Answer 1

Try this -

use Magento\Checkout\Model\Session as CheckoutSession;

public function __construct(
    CheckoutSession $checkoutSession
) {
    $this->checkoutSession = $checkoutSession;
}

public function getProductData()
{
    $quote = $this->checkoutSession->getQuote();
    $item = $quote->getItemById($productId);
    if($item)
    {
      echo "Item available in cart";
    }
    else
    {
      echo "Item not available in cart";
    }
}

Here $productId is your product id.

Answer 2

Well, this issue I am also facing when enabling of FPC cart item not getting properly, So there is another way of getting the cart item is through phtml/js file inject the following code as your requirment ,

require('Magento_Customer/js/customer-data').get('cart')().items

You can also refer to this link hopefully it will help you allot How to get Cart items collection on Product view page?