public function postNewDigitalSign(\Request $request, $device_id)
 {
     $digital_sign = new Resource();
     $vars = $request->getRequestVars();
     if (isset($vars['specific_device_id'])) {
         $digital_sign->setId($vars['specific_device_id']);
     }
     $digital_sign->setDeviceID($device_id);
     $digital_sign->setScreenSize(filter_input(INPUT_POST, 'screen_size', FILTER_SANITIZE_STRING));
     $digital_sign->setScreenManufacturer(filter_input(INPUT_POST, 'screen_manufacturer', FILTER_SANITIZE_STRING));
     if (isset($vars['hi_def'])) {
         $digital_sign->setHiDef(true);
     }
     self::saveResource($digital_sign);
 }