public function getMostVoted($num = 10) {
        
        $query = "SELECT count(v.idea_id) AS num, v.idea_id FROM idea_votes AS v JOIN idea_ideas AS i ON v.idea_id = i.id GROUP BY v.idea_id ORDER BY num DESC LIMIT 0, ?";
        
        foreach ($this->db->fetchAll($query, $num) as $row) {