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I've got some orders from the guest user and later they create their account and ask to link the old orders. How can I Do it? Please Help

3 Answers 3

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Using SQL -

UPDATE sales_order SET customer_id = {YOUR CUSTOMER ID}, customer_is_guest = 0 where entity_id = {YOUR ORDER ID};
UPDATE sales_order_grid SET customer_id = {YOUR CUSTOMER ID} where entity_id = {YOUR ORDER ID};

Using Extension -

Have a look at this solution - https://github.com/magepal/magento2-guest-to-customer

You can get some idea and customize it as per yours need.

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  • Without using an extenstion Nov 2, 2021 at 5:31
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Obtain the customer and the order from repositories and then:

$order->setCustomerId($customer->getId());
$order->setCustomerIsGuest(0);
$order->setCustomerFirstname($customer->getFirstname());
$order->setCustomerLastname($customer->getLastname());

$this->orderRepository->save($order);
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Finally, I got the solution for the above Question For Magento 2 Programatically!

include('app/bootstrap.php');

use Magento\Framework\App\Bootstrap;
use Magento\Customer\Api\AccountManagementInterface;
use Magento\Customer\Model\AccountManagement;

$bootstrap = Bootstrap::create(BP, $_SERVER);
$objectManager = $bootstrap->getObjectManager();

$state = $objectManager->get('Magento\Framework\App\State');
$state->setAreaCode('frontend');

$email = 'xxxx@gmail.com'; // Your Customer Id
$incrementId = '000000047'; // Your Order Increment Id from Admin Listing

$toCustomer = $objectManager->create('Magento\Customer\Model\Customer')->setWebsiteId(1)->loadByEmail($email);

$orderbyid = $objectManager->create('Magento\Sales\Model\Order')->loadByIncrementId($incrementId);

$orderbyid->setCustomerId($toCustomer->getId());
$orderbyid->setCustomerFirstname($toCustomer->getFirstname());
$orderbyid->setCustomerLastname($toCustomer->getLastname());
$orderbyid->setCustomerEmail($toCustomer->getEmail());
$orderbyid->setCustomerIsGuest(0);
$orderbyid->save();
echo "Done";

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