BoxEvent value is null when watching a LazyBox

[adiospace]

Question
When watching a lazy box by key, event.value is null. Is this the correct behaviour?

Code sample

await Hive.openLazyBox<Game>('games');
LazyBox<Game> game = await Hive.lazyBox('games').get('id');

game.watch(key: game.id).listen((e) { print(e.value == null);});

game.nextLevel++;
game.save();

Version

• Platform: iOS, Android, Mac, Windows, Linux, Web
• Flutter version: 1.12.13+hotfix.8
• Hive version: ^1.4.1+1

[dop3ch3f]

Seems to me like normal behavior. IMHO game.watch().listen is like the default stream subscription so it should behave like one and if its initialized without data its going to return null.

[simc]

When watching a lazy box by key, event.value is null. Is this the correct behaviour?

I don't think it is. Does this still happen?

[JayDev43]

Hi,

This has just happened to me too.

Debugging the code, I think the problem is that in LazyBoxImpl.putAll() the frame is being converted to a lazy Frame using frame.toLazy() and is then passed into the keystore.insert() method. When that frame makes it the the notifier as its a lazy Frame the value is null and this is what is then being sent out onto the stream.

Hope that helps solve the problem.

[kyleschlosser]

This just happened to me too. I am on ^1.5.0-pre.

[Abdelazeem777]

I am facing the same problem here with ^1.4.4+1.
Also, I did some debugging and I think the problem is with frame.toLazy() because it returns a frame with null value.

[dkunzler]

I can confirm the problem with 1.6.0-nullsafety.2