I an creating a customer address attribute using this code


namespace Ansh\CustomAddressAttribute\Setup;

use Magento\Customer\Model\Customer;
use Magento\Customer\Setup\CustomerSetup;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\UpgradeDataInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;

class UpgradeData implements  UpgradeDataInterface
    private $customerSetupFactory;

    public function __construct(\Magento\Customer\Setup\CustomerSetupFactory $customerSetupFactory)
        $this->customerSetupFactory = $customerSetupFactory;
    public function upgrade(ModuleDataSetupInterface $setup,
                            ModuleContextInterface $context){

        /** @var CustomerSetup $customerSetup */
        $customerSetup = $this->customerSetupFactory->create(['setup' => $setup]);

        $customerSetup->addAttribute('customer_address', 'sms', [
            'label' => 'Mobile (Courier text notifications)',
            'input' => 'text',
            'type' => \Magento\Framework\DB\Ddl\Table ::TYPE_TEXT,
            'source' => '',
            'required' => false,
            'position' => 333,
            'visible' => true,
            'system' => false,
            'is_used_in_grid' => false,
            'is_visible_in_grid' => false,
            'is_filterable_in_grid' => false,
            'is_searchable_in_grid' => false,
            'backend' => ''

        $attribute = $customerSetup->getEavConfig()->getAttribute('customer_address', 'sms')
            ->addData(['used_in_forms' => [


and its visible in my front end on last

enter image description here

also i added extension attribute using

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Api/etc/extension_attributes.xsd">
    <extension_attributes for="Magento\Quote\Api\Data\AddressInterface">
        <attribute code="sms" type="string" />

I am trying to get extension attribute's value in my plugin

as following


<?xml version="1.0" ?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Checkout\Model\ShippingInformationManagement">
        <plugin name="sms_address_save_plugin" type="Ansh\CustomAddressAttribute\Plugin\ShippingInformationManagementPlugin" sortOrder="10"/>

but when i am using getSms i am getting null


namespace Ansh\CustomAddressAttribute\Plugin;

class ShippingInformationManagementPlugin
    protected $quoteRepository;

    public function __construct(
        \Magento\Quote\Model\QuoteRepository $quoteRepository
    ) {
        $this->quoteRepository = $quoteRepository;

     * @param \Magento\Checkout\Model\ShippingInformationManagement $subject
     * @param $cartId
     * @param \Magento\Checkout\Api\Data\ShippingInformationInterface $addressInformation
    public function beforeSaveAddressInformation(
        \Magento\Checkout\Model\ShippingInformationManagement $subject,
        \Magento\Checkout\Api\Data\ShippingInformationInterface $addressInformation
    ) {
        $shippingAddress = $addressInformation->getShippingAddress();

        $shippingAddressExtensionAttributes = $shippingAddress->getExtensionAttributes();
        if ($shippingAddressExtensionAttributes) {
            $sms = $shippingAddressExtensionAttributes->getSms();


whats wrong i am doing Thanks for help

2 Answers 2


Knockout.js code reads and sends extension_attributes in the ajax request.

First, you need to fetch the saved attribute value in the js file.

please check

  1. vendor/magento/module-checkout/view/frontend/web/js/view/shipping.js
  2. vendor/magento/module-checkout/view/frontend/web/js/view/form/element/email.js
  3. vendor/magento/module-checkout/view/frontend/web/js/action/select-shipping-address.js

for your reference

from there via ajax request your address data will be passed in the server-side (PHP) code.

otherwise, you will not get the data on the server side.


you have created a customer address attribute to save on a quote address entity. I suggest creating an attribute for the quoted address first.

Then, the extension attribute should be on the interface \Magento\Checkout\Api\Data\ShippingInformationExtensionInterface

  • Then will I get input in shipping form? May 28, 2020 at 8:53
  • the most important is to change the extension interface in the extension_attributes file.. where you persist the data is possibly not the most important thing to change.. If you give it a go, if it does not work, I am happy to dig more May 28, 2020 at 8:55
  • hi thanks for help but i am not able to find Magento\Checkout\Api\Data\ShippingInformationExtensionInterface in vendor or genrated on what basis are you suggesting May 28, 2020 at 9:11
  • ok, will take a look but that might have to be tomorrow, thanks for your update May 28, 2020 at 9:12
  • thanks for your help May 28, 2020 at 9:14

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