Hello people, I got a Json like

[
  { // MovieRating.kt
    "rating": 7
    "movie": { // Movie.kt
      "title": ...,
      ...
  },
  { // ShowRating.kt
    "rating": 8
    "show": { // Show.kt
      "title": ...,
      ...
  }
]

For

Movie

and

Show

I've set the discriminator as:

@SerialName("movie")
data class Movie(...): Parent

Now, how to properly set a discriminator for

MovieRating

and

ShowRating

, based on the inner field

"movie"

/

"show"

?

it will be easier to deserialize to a

@Serializable
data class RatingContainer(
    val rating: Int,
    movie: MovieRating? = null,
    show: ShowRating? = null,
)

and then map that to the structure you want, possibly wrapped up with https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/serializers.md#composite-serializer-via-surrogate

Thank you for your answer! I would be glad if I could achieve that without a middle class, as I already have many classes for Trakt API and it’s getting confusing 😄 I will take a look at that doc. Have you got any alternatives? I rather create a custom serializer, than another data structure 🙂