HarmonyOS 鸿蒙Next 5.0.0怎么连接到AppGallery Connect云数据库啊

HarmonyOS 鸿蒙Next 5.0.0怎么连接到AppGallery Connect云数据库啊

import { cloudDatabase } from '@kit.CloudFoundationKit';
import { Article } from '../models/Article';
import { BusinessError } from '@kit.BasicServicesKit';

@Entry
@Component
export struct TestPage {
  aboutToAppear() {
    this.testQuery(); // 页面加载时触发测试查询
  }

  testQuery() {
    let databaseZone = cloudDatabase.zone('Hanmoshuyuan');
    if (!databaseZone) {
      console.error('Database zone initialization failed.');
      return;
    }

  }

  build() {
    Column() {
      Text('Testing Cloud Database Query...')
        .fontSize(20)
        .margin(20);
    }
  }
}

Build info:emulator 5.0.0.112(SP2DEVC00E112R4P11log)

Fingerprint:c9795b1fd981c17103ba8f51a2c0dbfdc14a3cf1c7170129828f46d705c854dc

Module name:com.cugb.hanmoshuyuan

Version:1.0.0

VersionCode:1000000

PreInstalled:No

Foreground:Yes

Pid:9966

Uid:20020043

Reason:TypeError

Error name:TypeError

Error message:Cannot read property zone of undefined

Stacktrace:

at testQuery (entry/src/main/ets/pages/Second.ets:14:24)

at aboutToAppear (entry/src/main/ets/pages/Second.ets:10:5)