Hello everybody. I am trying to use ResultBackNavi...

# compose-destinations

[Ilia Kazantsev]

Hello everybody.
I am trying to use ResultBackNavigatorMyType where MyType is

import kotlinx.serialization.Serializable

@Serializable
data class ModificationError(
    val myBoolean: Boolean,
)

The issue is I am getting the error
[ksp] com.ramcosta.composedestinations.codegen.commons.IllegalDestinationsSetup: Composable 'AddEditFavoritesScreen', ResultBackNavigatorModificationError: Result types must be of a valid navigation argument type, but was 'ModificationError'

Library version is 2.1.0-beta16
Kotlin serialization 1.8.0

I am using multimodule architecture and the screen destination and ModificationError are in different modules.

I would be so grateful to hear any suggestions what may be the problem here. 🥲 Am i missing something?

[Robert C]

Hello!
try this please

@Parcelize
data class ModificationError(
    val myBoolean: Boolean,
) : Parcelable

[Rafael Costa]

@Ilia Kazantsev try having the class in the same module. If I remember correctly, it won't work otherwise.

[Rafael Costa]

and issue is that KSP doesn't tell us info about classes on other modules, so it won't know that this class is Serializable.
Even if it does, it won't create the necessary nav type for us to be able to serialize it.

[Ilia Kazantsev]

@Rafael Costa yeah, it is working when the class in the same module
@Robert C indeed, is working well with parcelable even in the different module
I am a little bit confused, both

kotlin-serialization
kotlin-parcelize

are gradle plugins 🤔

[Ilia Kazantsev]

Thanks guys

[Ilia Kazantsev]

Seems like because with @Parcelize I have to mark type as Parcelable