* Constructor
         */
        public function __construct() {
+               //Set defaults
+               $this->created = new \DateTime('now');
+               $this->updated = new \DateTime('now');
                $this->sessions = new ArrayCollection();
        }
 
         */
        public function preUpdate(PreUpdateEventArgs $eventArgs) {
                //Check that we have a slot instance
-               if (($slot = $eventArgs->getEntity()) instanceof Slot) {
+               if (($slot = $eventArgs->getObject()) instanceof Slot) {
                        //Set updated value
                        $slot->setUpdated(new \DateTime('now'));
                }