How to get value of custom attribute on Magento 2 Rest API?

The below-mentioned steps assist you how to get the value of the custom attribute on Magento 2 Rest API,

Step 1: Create the latest column and locate the value for the offered order.
Step 2: Form a specific new file.
Step 3: Created the observer.
Step 4: create a file to handle the event.
Step 5: Remove folder to apply function.

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In this blog, I will explain to you how to get the value of the custom attribute on Magento 2 Rest,

Get the value of the custom attribute on Magento 2 Rest API

In the latest column name, I have created the table sales_order, ‘tip and trick_attribute’, and the place value for access orders. This is a custom attribute I find in this blog.

Form a specific new file

The file \app\code\Webnexs\TipAndTrick\etc\extension_attributes.xml in my extension folder by the following content:

<?xml version="1.0"?>

<config xmlns:xsi="" xsi:noNamespaceSchemaLocation="urn:magento:framework:Api/etc/extension_attributes.xsd">

<extension_attributes for="Magento\Sales\Api\Data\OrderInterface">

 <attribute code="tip_and_trick_attribute" type="string" />



I have to set the file since Magento 2 does not include a new field in the version of the Rest API.

Extension attributes.xml to include my custom attributes into c.

Create an observer in Magento 2 To Load Custom Attribute

I created an observer for event ‘sales_order_load_after’ through the file\app\code\Webnexs\TipsAndTricks\etc\events.xml to include my custom attribute in extension_attributes.xml.

<?xml version="1.0"?>

<config xmlns:xsi=""


<event name="sales_order_load_after">

    <observer name="sales_order_load_tip_and_trick_attribute" instance="Webnexs\TipAndTrick\Observer\Sales\OrderLoadAfter" />



Create a file to handle the event On Magento 2 – Rest API

I created a file app\code\Webnexs\TipAndTricks\Observer\Sales\OrderLoadAfter.php to hold the event ‘sales_order_load_after’ which I mentioned already.


namespace Webnexs\TipAndTrick\Observer\Sales;

use Magento\Framework\Event\ObserverInterface;

class OrderLoadAfter implements ObserverInterface


public function execute(\Magento\Framework\Event\Observer $observer)


 $order = $observer->getOrder();

 $extensionAttributes = $order->getExtensionAttributes();

 if ($extensionAttributes === null) {

 $extensionAttributes = $this->getOrderExtensionDependency();


 $attr = $order->getData('tip_and_trick_attribute');




private function getOrderExtensionDependency()


 $orderExtension = \Magento\Framework\App\ObjectManager::getInstance()->get(



 return $orderExtension;



I get my custom attribute from order data and set it into extension attributes of the orders in executing the function,

Magento 2 rest API – Remove folder to apply function

You should delete var\generation folder to apply function ‘setTipAndTrickAttribute’ and ‘getTipandTrickAttribute’ in file ‘var\generation\Magento\sales\Api\Data\orderExtension.php’. This file will be created automatically.

 Step 6

When I get the order on Magento 2 Rest, I observe my custom attribute in the response,

Wrapping up

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How to get value of custom attribute on Magento 2 Rest API?



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