Magento 2 - billing address not changed

Question

following code:

<?php
namespace UV\Adressen\Observer;

use Magento\Framework\Event\ObserverInterface;

class LieferadresseEditObserver implements ObserverInterface
{
    private $customerRepository;

    public function __construct()
    {

    }

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

        /*
        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
        $orderRepository = $objectManager->get('\Magento\Sales\Model\OrderRepository')->create();
        print_r(get_class_methods($order)); exit;
        $addressRepository->save($billingAddress);
        */

        $address = $observer->getEvent()->getAddress();
        if($address->getAddressType() == 'shipping') {
            error_log("Das ist eine Lieferadresse");
            $order = $address->getOrder();  
            #print_r(get_class_methods($order)); exit;
            $order->setBillingAddress($order->getShippingAddress());
            #$order->setShippingAddress($address);
            $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
            $orderRepository = $objectManager->get('\Magento\Sales\Model\OrderRepository');
            #print_r(get_class_methods($orderRepository)); exit;
            $orderRepository->save($order);
        } 
    }
}
?>

Why is the billing address not being changed to shipping address? They should be equal after the code has been executed. Thanks!

Answer 1

You don't need to use save() function.

$shippingaddressData = $order->getShippingAddress()->getData();

unset($shippingaddressData['entity_id]);

unset($shippingaddressData['parent_id]);

$order->setBillingAddress->setData($shippingaddressData);

instead of

    $order->setBillingAddress($order->getShippingAddress());
    #$order->setShippingAddress($address);
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $orderRepository = $objectManager->get('\Magento\Sales\Model\OrderRepository');
    #print_r(get_class_methods($orderRepository)); exit;
    $orderRepository->save($order);