Devdocs: Instruction for verification not clear

[terryx]

Feedback on page: /guides/v2.1/howdoi/checkout/checkout_new_field.html

Where to setup this part to verify data exist ?
$value = $address->getExtensionAttributes()->getCustomField(); Copy

[shrielenee]

Hey @irenelagno - This is regarding the last section of https://devdocs.magento.com//guides/v2.1/howdoi/checkout/checkout_new_field.html. Can you help us out with this? Thanks!

[shrielenee]

Hey @gelanivishal - Do you have info on this? Thanks in advance!

[irenelagno]

@shrielenee Depends on business logic. You can add plugins on api calls which uses on checkout to verify if data exists. For example

'guest': '/guest-carts/:cartId/shipping-information',
 'customer': '/carts/mine/shipping-information'

[gelanivishal]

@shrielenee @terryx
After perform this Step 4: Add field to address model step,

Now clear the var/generation when you run setup:di:compile command, new getter and setter methods will be added in /var/generation/Magento/Checkout/Api/Data/ShippingInformationExtensionInterface.php

Now you can set/get these attributes value by creating the instance of Magento/Checkout/Api/Data/ShippingInformationInterface.php interface.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$addressInformation = $objectManager->create('Magento\Checkout\Api\Data\ShippingInformationInterface');
$extAttributes = $addressInformation->getExtensionAttributes();

$selectedShipping = $extAttributes->getCustomShippingCharge(); //get custom attribute data.

I also give you an reference link which help to you.
Referece Link: https://www.zynovo.com/blog/magento-2-extension-attributes/

Note: I have used here $objectManager for your reference but It's not good practice.

Thank you.

[shrielenee]

Thanks @gelanivishal! Can you implement these changes in the docs and push up a PR for review? @jcalcaben can then approve or request changes, and facilitate merging, as needed. 🏆

[gelanivishal]

@shrielenee Let me create a PR for it.