Magento2: How to get quote item through item id?

Question

I want to get quote item through the item id on the guest page.

Got the null value

<?php
namespace Codism\Csr\Block\Index;

class Approveitem extends \Magento\Framework\View\Element\Template {

protected $_coreRegistry;


public function __construct(
    \Magento\Framework\View\Element\Template\Context $context,
    \Magento\Framework\Registry $coreRegistry,
    \Magento\Quote\Model\Quote\ItemFactory $quoteItemFactory,
    \Magento\Quote\Model\ResourceModel\Quote\Item $itemResourceModel
)
{
   $this->_coreRegistry = $coreRegistry;
   $this->quoteItemFactory = $quoteItemFactory;
   $this->itemResourceModel = $itemResourceModel;
   parent::__construct($context);
}

public function getCustomerCartDetails(){
    $itemId = $this->_coreRegistry->registry('itemId');

    $quoteItem = $this->quoteItemFactory->create();
    $item = $this->itemResourceModel->load($quoteItem, $itemId);

    return $item;
}
}

Answer 1

use Magento\Checkout\Model\Session;

public function __construct(
        ...
        Session $session
        ...
    ) {
        ...
        $this->_session = $session;
        ...
    }

public function yourCustomFunction()
{
    $items = $this->_session->getQuote()->getAllVisibleItems();
}

Answer 2

You can get by following code.

public function __construct(
  \Magento\Quote\Model\Quote\ItemFactory $quoteItemFactory,
  \Magento\Quote\Model\ResourceModel\Quote\Item $itemResourceModel
) {
   $this->quoteItemFactory = $quoteItemFactory;
   $this->itemResourceModel = $itemResourceModel

}

Below is code for your logic

$itemId = your item id
$quoteItem = $this->quoteItemFactory->create();
$this->itemResourceModel->load($quoteItem, $itemId);

This code is given here in answer.

Answer 3

Using getItemById from Quote Model

https://github.com/magento/magento2/blob/2.3-develop/app/code/Magento/Quote/Model/Quote.php#L1478

/**
 * Retrieve item model object by item identifier
 *
 * @param   int $itemId
 * @return  \Magento\Quote\Model\Quote\Item|false
 */
public function getItemById($itemId)
{
    foreach ($this->getItemsCollection() as $item) {
        if ($item->getId() == $itemId) {
            return $item;
        }
    }
    return false;
}

If you have quote

$quoteItem = $quote->getItemById($itemId);

For example

<?php

namespace Codism\Csr\Block\Index;

class Approveitem extends \Magento\Framework\View\Element\Template
{

    /**
     * @var \Magento\Backend\Model\Session\Quote
     */
    protected $_sessionQuote;

    protected $_coreRegistry;


    public function __construct(
        \Magento\Framework\View\Element\Template\Context $context,
        \Magento\Framework\Registry $coreRegistry,
        \Magento\Backend\Model\Session\Quote $sessionQuote
    )
    {
        $this->_coreRegistry = $coreRegistry;
        $this->_sessionQuote = $sessionQuote;
        parent::__construct($context);
    }

    public function getCustomerCartDetails()
    {
        $itemId = $this->_coreRegistry->registry('itemId');

        /** @var $quote \Magento\Quote\Model\Quote */
        $quote = $this->_sessionQuote->getQuote();

        if($itemId) {
            $quoteItem = $quote->getItemById(intval($itemId));

            return $quoteItem;
        }

        return null;
    }
}