new

switch($this->request->data['read_bydata']['model']){
  case 'ambulance':
  $this->ambulance_view_file_status($this->request->data['read_bydata']['file_id'],(isset($this->request->data['understand']) ? 2:3));
  break;
  case 'daily':
  $this->daily_view_file_status($this->request->data['read_bydata']['file_id'],(isset($this->request->data['understand']) ? 2:3));
  break;
  }

old

            if(isset($this->request->data['understand'])){

                switch($this->request->data['read_bydata']['model']){
                    case 'ambulance':
                        $this->ambulance_view_file_status($this->request->data['read_bydata']['file_id'],2);
                    break;
                    case 'daily':
                        $this->daily_view_file_status($this->request->data['read_bydata']['file_id'],2);
                    break;
                }

                
            }else{
                switch($this->request->data['read_bydata']['model']){
                    case 'ambulance':
                        $this->ambulance_view_file_status($this->request->data['read_bydata']['file_id'],3);
                    break;
                    case 'daily':
                        $this->daily_view_file_status($this->request->data['read_bydata']['file_id'],3);
                    break;
                }
            }