Is it possible to use nested Serializable in Compose type safe navigation? I tried it once but got t...

# compose

[Atul Gupta]

Is it possible to use nested Serializable in Compose type safe navigation? I tried it once but got the error. If not is it being tracked in some issue?

[Himanshu Joshi]

@Atul Gupta It is not supported ig

[Arne Jans]

What do you want to achieve with nested Serializables here?

[Himanshu Joshi]

Ig he wants to send a data class as params while navigation. I had the same use-case but it somehow didn't worked 😅

[Stylianos Gakis]

Might be worth showing what you tried and didn't work so far.
We use many serializable data classes that themselves have children data classes that are also serializable and so on, but it may work because of the way we did it.

[Atul Gupta]

I am getting the below error

java.lang.IllegalArgumentException: Cannot cast name of type Model to a NavType. Make sure to provide custom NavType for this argument.

My destination model is

@Serializable
data class Model(val id: String)

@Serializable
data class ParentModel(val id: String, val name: Model)

I think at internal fun SerialDescriptor.getNavType(): NavType<*> there is no handling of Serializable type

[Stylianos Gakis]

Well, what are you passing to the typeMap parameter?

[Atul Gupta]

Hi @Stylianos Gakis I have updated the code to include the Model class as well, both are @Serializable , also I didn't get what do you mean by typeMap

[Stylianos Gakis]

Take a look at this https://medium.com/androiddevelopers/navigation-compose-meet-type-safety-e081fb3cf2f8

If you have custom parameters, you need to create your own NavType and pass it to your composable destination in the typeMap parameter