Ionic 3-indexedDB中的多个表

Question

我想在indexedDB中使用两个表，但是inoic 3文档目前还不是很好。

在我导入了IonicStorageModule的app.modules中

IonicStorageModule.forRoot()

然后在我的storage-uitls.ts文件中，我试图在构造函数中生成两个表，就像提到的那样here

constructor(private storage: Storage) {
  console.log("---------------")
  this.gpsData = new Storage({
    name: '__my_custom_db',
    storeName: '_contacts',
    driverOrder: ['indexeddb', 'sqlite', 'websql'],
  });
  this.serviceData = new Storage({
    name: '__my_custom_db',
    storeName: '_media',
    driverOrder: ['indexeddb', 'sqlite', 'websql'],
  });
}

但是这不起作用。我只是在indexedDB中获得了默认的生成表。

任何人都知道如何生成自己的表并对其进行访问吗？

Answer 1

我对IONIC 4项目的设置（我没有在IONIC 3项目中尝试过：]

import { Storage } from '@ionic/storage';

@Component({
  selector: 'app-tab1',
  templateUrl: 'tab1.page.html',
  styleUrls: ['tab1.page.scss']
})
export class Tab1Page implements OnInit {

  private newReleasesDB: any;

  constructor() {
    this.newReleasesDB = new Storage({
      name: '__myCustom_db',
      storeName: '_newReleases',
      driverOrder: ['sqlite', 'indexeddb', 'websql', 'localstorage']
    });
  }

  ngOnInit() {
    // get saved records from Storage
    this.newReleasesDB.get('keyname').then((data: any) => {
        // do stuff with the data in storage
    });

  }
}

这可用于同一数据库中的多个存储，例如：

import { Storage } from '@ionic/storage';

@Component({
  selector: 'app-tab1',
  templateUrl: 'tab1.page.html',
  styleUrls: ['tab1.page.scss']
})
export class Tab1Page implements OnInit {

  private newReleasesDB: any;
  private myFrendsDB: any;

  constructor() {
    this.newReleasesDB = new Storage({
      name: '__myCustom_db',
      storeName: '_newReleases',
      driverOrder: ['sqlite', 'indexeddb', 'websql', 'localstorage']
    });

    this.myFrendsDB = new Storage({
      name: '__myCustom_db',
      storeName: '_myFriends',
      driverOrder: ['sqlite', 'indexeddb', 'websql', 'localstorage']
    });
  }

  ngOnInit() {
    // get saved records from Storage
    this.newReleasesDB.get('keyname').then((data: any) => {
        // do stuff with the data in storage
    });

    // get saved friends from Storage
    this.myFrendsDB.get('keyname').then((data: any) => {
        // do stuff with the data in storage
    });    
  }
}

[如果遇到问题，请尝试清除存储并再次运行脚本。