public function prePersist(Show $show, LifecycleEventArgs $event)
{
if (!$show->getPrimaryRef()) {
$refname = Sluggable\Urlizer::urlize($show->getName(), '_');
if ($show->getStartAt()) {
$year = $show->getStartAt()->format('y');
$refname = $year . '/' . $refname;
}
$ref = new ShowRef();
$ref->setShow($show);
$ref->setRef($refname);
$show->setPrimaryRef($ref);
}
}