/**
* @param $slug
* @return array|null|Post
* @throws NotFoundHttpException
*/
public function findBySlug($slug)
{
/** @var PostQuery $query */
$query = Post::find();
$query->published()->bySlug($slug);
if (($model = $query->one()) !== null) {
return $model;
} else {
throw new NotFoundHttpException('The requested page does not exist.');
}
}
