Migrating from Ionic 3 app to Ionic 5 Local Storage issue

Ionic Framework Ionic Angular
1

Hello fellow members. I have an issue and I searched a lot for a solution but couldn’t find a suitable one, I hope I can find one here.

I developed an Ionic 3 app two years ago and deployed on App Store & Play Store, now I have built a new version of the app using Ionic 5. My issue is that when I try to load the saved local storage data from the Ionic 3 app I get a null value! This means that when I deploy the new Ionic 5 version on stores and my users would update to the new version they will loose their previously saved data and would have to start again (Bad user experience).

Ionic 3

"@ionic/storage": "^2.2.0",

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

IonicStorageModule.forRoot({driverOrder: ['sqlite', 'indexeddb','websql']}),

this.storage.get('userData');

Ionic 5

"@ionic/storage": "^2.2.0",

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

IonicStorageModule.forRoot({driverOrder: ['sqlite', 'indexeddb', 'websql']}),

this.storage.get('userData');

How would I go about migrating the local stored data from version 3 to 5?
Any help regarding this matter would be appreciated, and if you need more info just let me know.

2

Are you using our cordova WKWebview plugin for v3?

they will loose their previously saved data and would have to start again (Bad user experience).

I mean, indexedDB and local storage both get cleared out regularly, so they’re not 100% reliable.

I would suggest digging further and comparing things. Hard to tell from what you’ve provided what the issue is.

3

@mhartington, thanks for responding.

I’m using cordova UIWebView in v3 and WKWebview in v5 obviously.

4

After further investigations, I discovered that I never installed cordova sqlite plugin, when I installed it I once again could read the local storage data.

5

can you please tell me what you did to make it works?

Thanks