Magento 2.2: How to add a custom attribute in to Order?

Question

I have created a custom attribute of type customer_address and I would like to have the API to return me the value as an attribute when I call the API to receive an order.

Attribute:

private function upgradeExternalKeyAddressCustomer($customerSetup)
{
 $attributesInfo = [
 'mod_external_key' => [
 'label' => __('External Key'),
 'type' => 'varchar',
 'input' => 'text',
 'position' => 200,
 'visible' => 1,
 'required' => 0,
 'system' => 0,
 ],
 ];
 foreach ($attributesInfo as $attributeCode => $attributeParams) {
 $customerSetup->addAttribute('customer_address', $attributeCode, $attributeParams);
 }
 foreach ($attributesInfo as $attributeCode => $attributeParams) {
 $attribute = $customerSetup->getEavConfig()->getAttribute('customer_address', $attributeCode);
 $attribute->setData(
 'used_in_forms',
 ['adminhtml_customer_address', 'customer_address_edit', 'customer_register_address']
 );
 $attribute->save();
 }
}

How to do this?

Answer 1

try this blog it will return your custom attribute in order api response https://www.atwix.com/development/adding-custom-attribute-to-api-response-in-magento-2/

• Gustavo Ulyssea: This tutorial is about extension attributes. How can I do that for an attribute outside of extension attributes ?