Using Deferred<…> in Room DAO with Kotlin Coroutines

Question

I\'m trying to use Coroutines with a Room database in an Android project. I\'ve found almost no documentation online, and I\'m wondering if it is possible to return De

Answer 1

Your issue lies in that you're mixing the suspending converter and the Deferred converter. Use one or the other and your code will work as intended.

• fun readMyObjectAsync(idMyObject: Int): Deferred<MyObject> - Best choice if you need to interface/be compatible with java code, since it doesn't require code transformations to actually function.
• suspend fun readMyObjectAsync(idMyObject: Int): MyObject - If you're operating on pure kotlin this will allow better control through the context it is called in.