2. The Order, OrderItem and OrderItemUnit


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Here is a quick reference of what the default models can do for you.

2.1. Order basics

Each order has 2 main identifiers, an ID and a human-friendly number. You can access those by calling ->getId() and ->getNumber() respectively. The number is mutable, so you can change it by calling ->setNumber('E001') on the order instance.




2.2. Order totals


All money amounts in Sylius are represented as “cents” - integers.

An order has 3 basic totals, which are all persisted together with the order.

The first total is the items total, it is calculated as the sum of all item totals (including theirs adjustments).

The second total is the adjustments total, you can read more about this in next chapter.


echo $order->getItemsTotal(); // 1900.
echo $order->getAdjustmentsTotal(); // -250.

echo $order->getTotal(); // 1650.

The main order total is a sum of the previously mentioned values. You can access the order total value using the ->getTotal() method.


It’s not needed to call calculateTotal() method, as both itemsTotal and adjustmentsTotal are automatically updated after each operation that can influence their values.

2.3. Items management

The collection of items (Implementing the Doctrine\Common\Collections\Collection interface) can be obtained using the ->getItems(). To add or remove items, you can simply use the addItem and removeItem methods.


// $item1 and $item2 are instances of OrderItemInterface.

2.4. OrderItem basics

An order item model has only the id as identifier, also it has the order to which it belongs, accessible via ->getOrder() method.

The sellable object can be retrieved and set, using the following setter and getter - ->getProduct() & ->setVariant(ProductVariantInterface $variant).




In most cases you’ll use the OrderBuilder service to create your orders.

Just like for the order, the total is available via the same method, but the unit price is accessible using the ->getUnitPrice() Each item also can calculate its total, using the quantity (->getQuantity()) and the unit price.


Concept of OrderItemUnit allows better management of OrderItem’s quantity. Because of that, it’s needed to use OrderItemQuantityModifier to handle quantity modification properly.


$item = $itemRepository->createNew();

$orderItemQuantityModifier->modify($item, 4); //modifies item's quantity to 4

echo $item->getTotal(); // 8000.

An OrderItem can also hold adjustments.

2.5. Units management

Each element from units collection in OrderItem represents single, separate unit from order. It’s total is sum of its item unit price and totals’ of each adjustments. Unit’s can be added and removed using addUnit and removeUnit methods from OrderItem, but it’s highly recommended to use OrderItemQuantityModifier.