public function update () : bool
	{
        $dbObject 	= Database::getInstance();
		$sqlQuery 	= "UPDATE ".static::$tableName." SET ".$this->generateQueryForUPdate();
		$sqlQuery  .= " WHERE id = ". $dbObject->escapeValue($this->id);
		$result 	= $dbObject->query($sqlQuery);
    	return ($result) ? TRUE : FALSE;
	}