Uncaught Error: Call to a member function addItem() on array in app/code/Magento/Sales/Model/Order/Shipment.php

[raisaev]

When adding a Track to a Shipment programmatically.

Preconditions

1. Magento 2.1.1
2. PHP 5.6.24

Steps to reproduce

1. Load or create a Shipment model

/** @var $shipment \Magento\Sales\Model\Order\Shipment */
$shipmentCollection = $this->_objectManager->get(
    'Magento\Sales\Model\ResourceModel\Order\Shipment\CollectionFactory'
)->create();
$shipment = $shipmentCollection->getFirstItem();

2. Make a call
   $shipment->getTracks();

3. Create a Track model and try to add it to the Shipment

/** @var $track \Magento\Sales\Model\Order\Shipment\Track */
$track = $this->_objectManager->get(
    'Magento\Sales\Model\Order\Shipment\TrackFactory'
)->create();
$track->setNumber('Test Number')
          ->setTitle('Test Title')
          ->setCarrierCode('Test CODE');

$shipment->addTrack($track)->save();

Expected result

1. Successfull save

Actual result

You will receive an error Call to a member function addItem() on array because the method getTracksCollection() in Shipment model will return an array instead of Collection Object.

[xmav]

@raisaev Thanks for reporting this issue.
We've created internal ticket MAGETWO-63653 to address this issue.

[titechnologies]

Is it solved yet ?