Hello, I’m trying to serialize a generic class `ApiResponse<T>` with `kotlinx.serialization`. ...

# serialization

[savrov]

Hello,
I’m trying to serialize a generic class ApiResponse<T> with kotlinx.serialization. So i’ve created a ApiResponseSerializer class, with help of docs. But now i don’t understand how to use that serializer, since none of provided methods doesn’t seem to suit to me. That is the place where i need a help.

My ApiResponse<T> is defined like:

data class ApiResponse<T>(
    val data: T? = null,
    val error: ApiError? = null
)

And the regular usage (in KTOR server) is

respond(
    HttpStatusCode.Created,
    ApiResponse(data = response.data)
)

I don’t know where i can “attach” my serializer to data field of my ApiResponse class.
Thank you in advance.

[andylamax]

for convenience let me create a test class, say

@Serializable
data class Movie(val title: String,val year: Int)

if you need a ApiResponse<Movie> in json you would stringify as

Json.stringify(ApiResponse.serializer(Movie.serializer),Move("Matrix",99))

I am not sure how to make it work with content negotiation. But If all the classess are annotated well, I assume it will work out of the box

[savrov]

i suppose Json.stringify will work, since since we provide Movie’s serializer. But my goal is to make it done automatically, without typing it every time

[Nikky]

That has to rely on reflection then.. And defeats some of the reasons for using serialuzation