1

How to add custom product attribute into existing product graphql query in the custom module in Magento 2.

THANKS.

2 Answers 2

3

Step 1 :- You Create registration.php file

<?php
/**
 * @author Mohit Patel
 * @copyright Copyright (c) 2021
 * @package Mag_ExtendQuery
 */

\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Mag_ExtendQuery',
    __DIR__
);

Step 2 :- create etc/module.xml file

<?xml version="1.0"?>
<!--
/**
 * @author Mohit Patel
 * @copyright Copyright (c) 2021
 * @package Mag_ExtendQuery
 */
-->

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Mag_ExtendQuery" setup_version="2.0.0">
        <sequence>
            <module name="Magento_Backend"/>
            <module name="Magento_GraphQl"/>
        </sequence>
    </module>
</config>

Step 3 :- GraphQL queries are declared under etc/schema.graphqls

interface ProductInterface @typeResolver(class: "Magento\\CatalogGraphQl\\Model\\ProductInterfaceTypeResolverComposite") @doc(description: "The ProductInterface contains attributes that are common to all types of products. Note that descriptions may not be available for custom and EAV attributes.") {
    your_custom_attribute: String @doc(description: "Brand Name based on manufacturer attribute") @resolver(class: "Mag\\ExtendQuery\\Model\\Resolver\\Product\\AddCustomAttribute")
}

Setp 4 :- Create Resolver Class Model/Resolver/Product/GetCustomAttribute.php

<?php
/**
 * @author Mohit Patel
 * @copyright Copyright (c) 2021
 * @package Mag_ExtendQuery
 */

namespace Mag\ExtendQuery\Model\Resolver\Product;

class GetCustomAttribute implements \Magento\Framework\GraphQl\Query\ResolverInterface
{

    public function resolve(
        \Magento\Framework\GraphQl\Config\Element\Field $field,
        $context,
        \Magento\Framework\GraphQl\Schema\Type\ResolveInfo $info,
        array $value = null,
        array $args = null
    ) {
        $product = $value['model'];
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $_product = $objectManager->get('Magento\Catalog\Model\Product')->load($product->getId());
        return $_product->getData('product_name');
    }
}

Setp 5 :- Final step you check output. Run this query

{
  products(filter: { sku: { in: "new testing" } }){
    items {
      your_custom_attribute
    }
  }
}

Output

enter image description here

Check More Links

How to create graphql mutation :- https://magento.stackexchange.com/a/351569/85907

How to create graphql query :- https://magento.stackexchange.com/a/351567/85907

THANKS.

1
  • Yes this works But if I want to work with filters or sort, I always receive NULL in $args.. Any Solution for this ? Feb 20, 2023 at 14:01
1

Now you can just add that attribute in your graphql query like below and it will show up in response:

{
  products(filter: { sku: { eq: "24-MB01" } }){
    items {
      sku
      cproduct_attribute
    }
  }
}

I have tried this in Magento 2.4

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