How do you send additional attributes to order using /rest//V1/guest-carts/{cart-id}/order REST API Magento 2?

Question

I have successfully placed order by creating cart and finally calling rest api /rest//V1/guest-carts/{cart-id}/order to place the order. Now I am trying to add an additional attribute custom_attribute to be displayed on orders table page of admin dashboard but am unable to figure out the way around.

I have tried to extend the magento functionality using following link but somehow cannot set custom attribute via rest api

https://www.yereone.com/blog/magento-2-how-to-add-new-order-attribute/

Answer 1

You can do that with help of extension attributes , here is magento documentation how to add an extension attribute https://devdocs.magento.com/guides/v2.4/extension-dev-guide/extension_attributes/adding-attributes.html

There are also some stack questions that you can refer to

Add extension attribute to Order

and some good articles https://www.rakeshjesadiya.com/extension-attribute-in-order-data-magento-2/

• Praveen Soni: I am unable to get this line working: $orderComment = $order->getData(self::FIELD_NAME); as given in the article I am calling the api : /rest//V1/guest-carts/{cart-id}/order and passing 'order_comment' in request but somehow unable to access it here.
• Vishwas Bhatnagar: Share in question , the code you have tried