Get quote item id after product added to cart in observer

Question

I am working on a custom module where a single product of a certain sku (say fixed-product) will be added to cart multiple times, but with different custom options programmatically. I also need to store it's item_id in another custom table for later use.

I managed to display the different products as separate entities on the cart (instead of just adding the quantity) by rewriting the Codilar\ProfServices\Model\Rewrite\CartItem::representProduct() method to return false if the conditions are met.

But I cannot obtain the item_id of the item once it's added to cart. I tried the following events

checkout_cart_product_add_after and sales_quote_item_set_product

but in the observer when I do $this->getEvent()->getQuoteItem()->getItemId() it always returns NULL

How do I get the item_id of an item added to cart in the observer?

Answer 1

For checkout_cart_add_product_complete event

<?php
namespace Vendor\Module\Observer;

use Magento\Framework\Event\Observer as EventObserver;
use Magento\Framework\Event\ObserverInterface;
use Magento\Checkout\Model\Session as CheckoutSession;

class CheckoutCartAddProductCompleteObserver implements ObserverInterface
{
    private $_checkoutSession;

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

    public function execute(EventObserver $observer)
    {
        /** @var \Magento\Catalog\Model\Product $product */
        $product = $observer->getEvent()->getDataByKey('product');

        /** @var \Magento\Quote\Model\Quote\Item $item */
        $item = $this->_checkoutSession->getQuote()->getItemByProduct($product);

        $itemId = $item->getId();
    }
}

Answer 2

Create events.xml at

app/code/Vendor/Module/etc/events.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">

    <event name="checkout_cart_add_product_complete">
        <observer name="get_quote" instance="Vendor\Module\Observer\Getquote" />
    </event>

</config>

Create Getquote.php at

app/code/Vendor/Module/Observer/Getquote.php

<?php

namespace Vendor\Module\Observer;

use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;

class Getquote implements ObserverInterface
{
    protected $_checkoutSession;

    public function __construct(
        \Magento\Checkout\Model\Session $checkoutSession
    )
    {   
        $this->_checkoutSession = $checkoutSession;
    }

    public function execute(Observer $observer)
    {
        $quoteItems = $this->_checkoutSession->getQuote()->getAllVisibleItems();

    }
}

Answer 3

You can access the Quote object itself if you do a $observer->getEvent()->getQuote() right?

If so, you may try the following:

$items = $observer->getEvent()->getQuote()->getAllVisibleItems(); // get only visible items
$maxId = 0;
foreach ($items as $item){
  if ($item->getId() > $maxId) {
     $maxId = $item->getId();
  }
}
$lastItemId = $maxId;

This should get you the last item ID that was added in, for instance, checkout_cart_product_add_after.

But it may be that the cart is not yet saved at checkout_cart_product_add_after (then your last added item will not yet have an item id) so maybe you should check if there is a checkout_cart_add_product_complete. That one should work.