public function __construct(Factory $factory)
 {
     parent::__construct($factory);
     // 		foreach ($this->db->select('child, parent', $this->relationsTable, '') as $row) {
     // 			if (!isset($this->parentsIndex[$row['child']]))
     // 				$this->parentsIndex[$row['child']] = array($row['parent']);
     // 			else
     // 				$this->parentsIndex[$row['child']][] = $row['parent'];
     // 		}
 }
 public function __construct(Factory $factory, TagFactory $tagFactory)
 {
     parent::__construct($factory);
     $this->tagFactory = $tagFactory;
 }