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Magento 2 - How to add product's custom attribute to checkout summary

Sejal Shah Oct 01, 2018

JavaScript Digital Commerce Magento 2.0 eCommerce KnockoutJS

Adding custom attributes to Magento 2 Checkout is a complex task since the whole checkout is built up from a series of KnockoutJS components, which are then rendered using the knockout.js templating system. Magento 2 defines these components and their mutual relationship in a large XML file. To pull the data from the server, Magento uses global Javascript variable window.checkoutConfig that is then used by Knockout.js to compute and display information on the frontend.

You will have to create a plugin for that. I wanted to add product flavor to order summary for each product.

Here are the steps and the code:

Attribute to display = Flavor
Vendor Name = Store
Module Name = Flavor

Files you need to create:

  1. Registration.php : app/code/Store/Flavor/registration.php
  2. di.xml : app/code/Store/Flavor/etc/di.xml
  3. module.xml : app/code/Store/Flavor/etc/module.xml
  4. ConfigProviderPlugin.php : app/code/Store/Flavor/Plugin/ConfigProviderPlugin.php
  5. details.js : copy of vendor/magento/module-checkout/view/frontend/web/js/view/summary/item/details.js
  6. details.html : copy of vendor/magento/module-checkout/view/frontend/web/template/summary/item/details.html





<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
<type name="Magento\Checkout\Model\DefaultConfigProvider">
<plugin name="AddAttPlug" type="Store\Flavor\Plugin\ConfigProviderPlugin" />


<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
<module name="Store_Flavor" setup_version="1.0.0">



namespace Store\Flavor\Plugin;

use Magento\Checkout\Model\Session as CheckoutSession;
use Magento\Quote\Api\CartItemRepositoryInterface as QuoteItemRepository;

class ConfigProviderPlugin extends \Magento\Framework\Model\AbstractModel
private $checkoutSession;
private $quoteItemRepository;
protected $scopeConfig;

public function __construct(
CheckoutSession $checkoutSession,
QuoteItemRepository $quoteItemRepository,
\Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
) {
$this->_scopeConfig = $scopeConfig;
$this->checkoutSession = $checkoutSession;
$this->quoteItemRepository = $quoteItemRepository;

public function afterGetConfig(\Magento\Checkout\Model\DefaultConfigProvider $subject, array $result)
$quoteId = $this->checkoutSession->getQuote()->getId();
if ($quoteId) {
$itemOptionCount = count($result['totalsData']['items']);
$quoteItems = $this->quoteItemRepository->getList($quoteId);
$isbnOptions = array();
foreach ($quoteItems as $index => $quoteItem) {
$quoteItemId = $quoteItem['item_id'];
$isbnOptions[$quoteItemId] = $quoteItem['isbn'];

for ($i=0; $i < $itemOptionCount; $i++) {
$quoteParentId = $result['totalsData']['items'][$i]['item_id'];
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$productId = $result['quoteItemData'][$i]['product']['entity_id'];
$productObj = $objectManager->create('\Magento\Catalog\Model\Product')->load($productId);

$productFlavours = $productObj->getResource()->getAttribute('flavors')->getFrontend()->getValue($productObj);
if($productFlavours == 'No' || $productFlavours == 'NA'){
$productFlavours = '';
$result['quoteItemData'][$i]['flavor'] = $productFlavours;
return $result;



function (Component) {
"use strict";
var quoteItemData = window.checkoutConfig.quoteItemData;
return Component.extend({
defaults: {
template: 'Magento_Checkout/summary/item/details'
quoteItemData: quoteItemData,
getValue: function(quoteItem) {
return quoteItem.name;
getItemFlavor: function(quoteItem) {
var itemProduct = this.getItemProduct(quoteItem.item_id);
return itemProduct.flavor;
getItemProduct: function(item_id) {
var itemElement = null;
_.each(this.quoteItemData, function(element, index) {
if (element.item_id == item_id) {
itemElement = element;
return itemElement;




Add this code
<span class="product-item-new" data-bind="text: getItemFlavor($parent)"></span>

If you have any further queries about the code, feel free to comment in the comment section below..

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