How to get the custom attribute of products from the cart?

Question

There is an attribute in the product AllowSameDayDelivery how can I get it out of the product?

I got the products ids from the cart, But how do I get the attribute now?

<?php

namespace Ronis\SameDayDelivery\Observer;

use Magento\Framework\Event\ObserverInterface;
use \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory;

class DayDelivery implements ObserverInterface
{
    protected $resultPageFactory;

    /**
     * @var \Magento\Checkout\Model\Cart
     */
    protected $_cart;
    protected $_productCollectionFactory;

    /**
     * [__construct description]
     * @param \Magento\Framework\App\Action\Context $context [description]
     * @param \Magento\Framework\View\Result\PageFactory $resultPageFactory [description]
     * @param \Magento\Checkout\Model\Cart $cart [description]
     */
    public function __construct(
        \Magento\Framework\App\Action\Context $context,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory,
        \Magento\Checkout\Model\Cart $cart,
        CollectionFactory $productCollectionFactory
    ) {
        $this->resultPageFactory = $resultPageFactory;
        $this->_cart = $cart;
        $this->_productCollectionFactory = $productCollectionFactory;
    }

    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $writer = new \Zend\Log\Writer\Stream(BP . '/var/log/delivery.log');
        $logger = new \Zend\Log\Logger();
        $logger->addWriter($writer);

        $cartProductIds = $this->_cart->getQuoteProductIds();
        $productCollection = $this->_productCollectionFactory->create();
        $productCollection->addFieldToFilter('entity_id', ['in' => [$cartProductIds]]);
        foreach ($productCollection as $item){
            var_dump ($item->getAllowSameDayDelivery());die;
        }
    }
}

now it always returns null even though it is in this product.

Answer 1

In the product collection you will get only product attributes with the flag Used in Product Listing set to 'yes'.

Therefore you have two solutions:

1. Set the flag Used in Product Listing set to 'yes' for your attribute allow_same_day_delivery (I guess that's your attribute_code)

or alternative

2. load the product by Id for each product in the foreach loop using the ProductFactory, then you have all attributes available