Using Event Subscriber change the product custom field value after first checkout of that product

Question

Using 'Event Subscriber', I'm able to get $order and $items from the order after completing the checkout.

How can I get the product id from the $itemsand modify the product custom field value?

Scenario: I want to change the status of the product after completing the first checkout of that product.

Answer 1

Do you really want to change the status of the product or the product variation?

$items is an array of OrderItems. If you loop over the items, you can get the referenced purchased entity of the single item with $purchasedEntity = $item->getPurchasedEntity();. If you only want the first item you can access it like so $purchasedEntity = $items[0]->getPurchasedEntity();. In case the PurchasedEntity is a ProductVariation you can get the product with $product = $purchasedEntity->getProduct();

In case you want to change the status of the product:

$product->setUnpublished();

Or for the variation:

$variation->setActive(false);

If you want to set any custom field on the product variation:

$variation->set('your_custom_field_name', $value);

docs This assumes you use the default commerce2 product architecture. It is absolutly possible that you get other purchasable entities than ProductVariations back from the OrderItem.