DDD: refer to an entity inside an aggregate root by its identity

Question

I\'m stuck on finding the proper way to refer to entities located inside an aggregate root, when we only got their identities coming from URL paramete

Answer 1

OrderLineId is what exactly? It has no meaning. You're updating the quantity of a PRODUCT and that's what should be used as the id.

Order order = orderRepository.find(orderID);
order.updateQuantity(productID, 2);