Problem of EmbeddedObject nested collection binding (.net Xamarin Forms)

[aliegeni]

Discussed in #2839

^{Originally posted by aliegeni March 6, 2022}
Despite official docs says: "You can use the same embedded object type in multiple parent object types and you can embed objects inside of other embedded objects."
You get the RealmInvalidObjectException: "Can't enumerate the collection because it was deleted or the Realm it is contained in has been closed." when trying to update parent RealmObject with EmbededObject member witch has inside List of other embedded objects.
That makes "live" data binding impossible in Xamarin Forms! Is there any workaround?

Project to reproduce the issue.
https://github.com/aliegeni/RealmXamarinTest

[nirinchev]

Can you share your project?

[aliegeni]

Can you share your project?

https://github.com/aliegeni/RealmXamarinTest

[nirinchev]

You can't have multiple objects referencing the same embedded object. In your repository you're adding the same track to multiple albums and the same album to multiple artists.

[aliegeni]

That not the case! It is not possible even to add same instance of embedded object to multiple realms! That why there is deep cloning at the and of repository GetData() function . My repository is just for mimic web API response that return deserialized JSON data as unmanaged RealmObject.
Issue is related about already managed nested list iteration.

To convince you, just updated my project to more straight forward repository.

[nirinchev]

My bad - I misunderstood where the original problem was manifesting. I can see the actual issue now and it seems to be databinding related. Should be simple to workaround.

(Also, sorry if you had already shared your project in the first post - the Github mobile app sometimes truncates messages and must have missed it.)

[sync-by-unito]

➤ Andrea Catalini commented:

Fixed by #2841

[PawKanarek]

@nirinchev Do you know when will be available new Realm Nuget package with this fix? I have the same issue, app is crashing & i don't know how to make workaround :(

[nirinchev]

We're wrapping up a few in-flight PRs and will do a release shortly after. Either this week or early next one.