排查错误

本部分介绍了如何处理错误。

处理 update_mask 错误

当 updateMask 查询参数为空时，可能会发生 update_mask 错误。为避免出现此错误，请始终提供至少一个字段名称。它通常会在启动后的首次更新时发生。如需详细了解如何在车队引擎中更新车辆字段，请参阅更新车辆字段。

以下示例展示了如何处理此错误：

Swift

import GoogleRidesharingDriver

class VehicleReporterListener: NSObject, GMTDVehicleReporterListener {
  func vehicleReporter(
    _ vehicleReporter: GMTDVehicleReporter,
    didFail vehicleUpdate: GMTDVehicleUpdate,
    withError error: Error
  ) {
    let fullError = error as NSError
    if let innerError = fullError.userInfo[NSUnderlyingErrorKey] as? NSError {
      let innerFullError = innerError as NSError
      if innerFullError.localizedDescription.contains("update_mask cannot be empty") {
        emptyMaskUpdates += 1
        return
      }
    }
    failedUpdates += 1
  }

  override init() {
    emptyMaskUpdates = 0
    failedUpdates = 0
  }
}

Objective-C

#import "VehicleReporterListener.h"
#import <GoogleRidesharingDriver/GoogleRidesharingDriver.h>

@implementation VehicleReporterListener {
  NSInteger emptyMaskUpdates = 0;
  NSInteger failedUpdates = 0;
}

-   (void)vehicleReporter:(GMTDVehicleReporter *)vehicleReporter
   didFailVehicleUpdate:(GMTDVehicleUpdate *)vehicleUpdate
              withError:(NSError *)error {
  for (NSError *underlyingError in error.underlyingErrors) {
    if ([underlyingError.localizedDescription containsString:@"update_mask cannot be empty"]) {
      emptyMaskUpdates += 1;
      return;
    }
  }
  failedUpdates += 1
}

@end