Magento: not shipped item collection - php

Question

I would like to get all items that has not been shipped for a given order.
Suppose that I have a partial shipped order I would like to retrieve all items that are pending to be shipped.
Something like:
$collection = Mage::getModel('...')->getCollection()
->Add...()

Answer 1

To get all items of the order, use the item collection:
$order = Mage::getModel('sales/order')->load($orderId);
$orderItems = $order->getItemsCollection();
And then use the shipment model to get all the items of the order:
$shippedItems = Mage::getModel('sales/order_shipment')
->setOrder($order)->getItemsCollection();
Edit2: Turns out that setting the order on the shipment does not work to get the items collection, since there can be several shipments for an order. Use the code snippet provided below, instead.
Edit: I forgot that there could be several shipments, so here is the full working code to get all Ids of the order items and all Ids of the shipped ones:
$orderId = 15;
$order = Mage::getModel('sales/order')->load($orderId);
$orderItems = $order->getItemsCollection();
$allOrderItemIds = $orderItems->getAllIds();
$shipments = $order->getShipmentsCollection();
$shippedItemIds = array();
foreach ($shipments as $shipment) {
$shippedItems = $shipment->getItemsCollection();
foreach ($shippedItems as $item) {
$shippedItemIds[] = $item->getOrderItemId();
}
}
var_dump($allOrderItemIds);
var_dump($shippedItemIds);

Answer 2

$orderId = 382;
$order = Mage::getModel('sales/order')->load($orderId);
// OR if you load the order with increment id ...
// $order = Mage::getModel('sales/order')->loadByIncrementId($orderId);
$orderItems = $order->getItemsCollection();
foreach ($orderItems as $item) {
$qtyToBeShipped = $item->getQtyOrdered() - $item->getQtyShipped();
if ($qtyToBeShipped)
echo $item->getId() . ' - ' . $qtyToBeShipped . '</br>';
}