cara solve

    function exist($params=null){
        log_message("type:model |function:exist |file:dynamic_pages.php",'RunFunction');
        log_message("param:".json_encode($params)." |function:exist_param |file:dynamic_pages.php",'info');
        //return count($this->get_all(array('content_id' => $content_id))) == 1;
        try {
            $filter=array();
            if(is_array($params)){
                $filter=$params;
            }
            else{
                $filter['content_id']=$params;
            }

            $exist= $this
                ->get_all($filter,1);
            $exist=true;
        }
        catch (Exception $e) {
            log_message("check result:false |data id:{$id} |filter:".json_encode($filter),"info");

            $exist=false;
        }
        return $exist;
    }