Error when opening synced realm with current user while offline

Steps:

1. Log into ROS and get a User.
2. Open a synced realm with this User.
3. Shut down the ROS.
4. Restart the app.
5. Try to open the same realm with the User from step 1.

After after these steps, opening the realm (using new Realm(config)) succeeds, but throws a “Network request failed” error shortly after (this is a React Native red box error and isn’t even catchable with a try/catch around the Realm instantiation).

Code:

export default class App extends Component<Props> {
  constructor() {
    super();
    this.logIn();
  }

  async logIn() {
    let user = Realm.Sync.User.current;

    if (!user) {
      user = await Realm.Sync.User.login(LOGIN_URL, 'test', 'test');
    }

    const config = {
      sync: {
        user,
        url: REALM_URL,
      },
      schema: [],
    };

    const realm = new Realm(config);
  };
}

System:

• Realm JS SDK Version: 2.3.3
• Node or React Native: React Native 0.54.2
• Client OS & Version: iOS
• Which debugger for React Native: None

[gonza-lito]

hi @kneth , so for what I understand, the problem is this line right here: https://github.com/realm/realm-js/blob/2490d80d65782403a63d5638cd421d43737cf01f/lib/user-methods.js#L326

It fails with an error that is pretty visible, and for the case in question it would be nice to have a way to fail grafully since there’s no connection available, allowing for the error to be dismissed by the user or handled elsewhere.

My first idea, is to throw that error up in the stack so that it can handled by whoever is calling refreshAccessToken, but I think i’m lacking some context over this.

Another more simple approach is to just remove the console for a log tool so that we can ignore the error message.

[sync-by-unito[bot]]

➤ Kenneth Geisshirt commented:

We have changes the API in Realm JS v10. Moreover, it is possible to specify different opening behaviour in the configuration which will help is the offline case.