addOrderItem

Add an item to an order.

**Arguments**

Name	Type	Description	Required	Default
`order_id`	ID	The ID of the order to add the item to	Yes
`product_id`	ID	The ID of the product to add to the order	Yes
`quantity`	Integer	The quantity of the product to add	Yes
`price`	Decimal	The price of the product to add	Yes	0.0

**Returns**

An OrderItem object if the operation is successful.

**Errors**

Name	Description
`NotFoundError`	Returns if the order or product is not found
`ValidationError`	Returns if the product does not belong to the same brand
as the order, is not active, or if the quantity or price is not a positive
value. Also returns if the order is in a disallowed status (fulfilled,
canceled, shipped, completed)

addOrderItem(
  input: AddOrderItemInput!
): OrderItem!

Parameters for AddOrderItem

The order item type. This type represents an order item in the system.