Files written to the file-system are lost after update

[shiv19]

We noticed that after an AppSync update, the files that the app writes to the file system are lost. However, things stored in App-Settings remain intact.

[EddyVerbruggen]

Hmm, interesting one. Can you tell me how you wrote to the fs (a snippet would be helpful) and which platforms are affected?

[shiv19]

import { knownFolders } from 'tns-core-modules/file-system';
const documents = knownFolders.documents();
const jsonFile = documents.getFile('/app/something.json');
jsonFile.readText().then(function(content) {}); // for read
jsonFile.writeText(text).then(function() {}); // for write

Something like this. And I realize that files are being written into app folder in this app.

[shiv19]

@EddyVerbruggen I believe this affects both Android and iOS since the files are in app folder. But I haven't tested it on iOS

[EddyVerbruggen]

Thanks for the snippet. Looking at this today and reporting my findings here. Note that an iOS sim and device behave differently, so that's why I'll test both of those separately.

• [x] iOS Simulator ✅
• [x] iOS Device ✅(so iOS seems fine)
• [x] Android Device ❌(I can confirm the issue)

[EddyVerbruggen]

Hey @shiv19, can you please give version 1.0.2 a try?

On Android (only) I used to rename the /app folder to /app_backup and then rename the folder with the pending update to /app. So that's why files saved to /app were lost. I guess if you save to different folders there wouldn't be an issue.

I've now updated the algorithm to instead copy the new files over the current /app folder, so anything already there won't be removed.

[shiv19]

Thanks @EddyVerbruggen I'll give it a try today :)

[shiv19]

@EddyVerbruggen It worked! :D Thank you

[EddyVerbruggen]

Woohoo, thx for testing this!