The listener is removed once the flow completes or is cancelled. Often you are only interested in the latest value received, in this case you can use the conflate operator to disable buffering. A buffer with the default size is used to buffer values received from the listener, use the buffer operator on the flow to specify a user-defined value and to control what happens when data is produced faster than consumed, i.e. The flows are cold, which means a new listener is added every time a terminal operator is applied to the resulting flow. It is important to remember that unlike a callback based API, wating for suspending functions to complete is implicit and so if you don't want to wait for the result you can launch a new coroutine: //TODO don't use GlobalScopeĪsynchronous streams of values are represented by Flows in the SDK instead of repeatedly invoked callbacks or listeners, for example: val snapshots: Flow Like exception says the problem is that you haven't registered polymorphic serialization for your Foo class.Unlike the Kotlin Extensions for the Firebase Android SDK this project does not extend a Java based SDK so we get the full power of Kotlin including coroutines and serialization! Suspending functionsĪsynchronous operations that return a single or no value are represented by suspending functions in the SDK instead of callbacks, listeners or OS specific types such as Task, for example: suspend fun signInWithCustomToken(token: String): AuthResult I've tried faffing with versions of things to see if that helps, but overall, no dice. I was sort of expecting it to work, but I got the error above.
My kotlinx serialization is implementation(":kotlinx-serialization-json:1.4.0"),īut also have set kotlin("rialization") version "1.7.20" This is thrown from val tmp = Json.encodeToString(this)īut as far as I can tell, that's exactly what I have done? what have I done wrong? am I doing something overall stupid? I'm sort of stumped. Mark the base class as 'sealed' or register the serializer explicitly. The issue I have, is when i get to aa.save(), I get : Class 'Foo' is not registered for polymorphic serialization in the scope of 'Bar'. Hoping you might be able to help, as I'm slowly tearing my hair out and I'm not sure where I've gone wrong, but hope it might also be class Foo
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