Kotlin Notebook deserializeJson with invalid class schema

Okay, i have reproduced the issue for another url. here is the full code that has the problem also;

%trackExecution

%use ktor-client, dataframe

import io.ktor.client.request.headers
import io.ktor.http.HttpHeaders
import io.ktor.http.append

val response = http.get("https://api.gainapis.com/v2/content/playlist/category?playlistLimit=100&videoLimit=100&cw=false&categoryId=pFlIW25nHIeRkjjIBLLg&lastPlaylistIndex=0") { 
    headers {
        append("x-app-language", "TR")
    }
}

val deserializeJson = response.deserializeJson() 

the output;


Executing:
val deserializeJson = response.deserializeJson()

Executing:

import kotlinx.serialization.SerialName
import kotlinx.serialization.Serializable

@Serializable
data class DeserializeJson(
   @SerialName("data")
   val `data`: Data,
   @SerialName("error")
   val error: Error
)

@Serializable
data class Data(
   @SerialName("playlists")
   val playlists: List<Playlists>,
   @SerialName("isLastPage")
   val isLastPage: Boolean,
   @SerialName("lastPlaylistIndex")
   val lastPlaylistIndex: Int,
   @SerialName("totalCount")
   val totalCount: Int
)

@Serializable
class Error

@Serializable
data class Playlists(
   @SerialName("list")
   val list: List<>,
   @SerialName("lastPage")
   val lastPage: Boolean,
   @SerialName("lastIndex")
   val lastIndex: Int,
   @SerialName("totalCount")
   val totalCount: Int,
   @SerialName("name")
   val name: String,
   @SerialName("type")
   val type: String,
   @SerialName("playlistId")
   val playlistId: String,
   @SerialName("playlistType")
   val playlistType: String
)

@Serializable
data class (
   @SerialName("id")
   val id: String,
   @SerialName("metadata")
   val metadata: Metadata,
   @SerialName("episodeNumber")
   val episodeNumber: Int?,
   @SerialName("seasonNumber")
   val seasonNumber: Int?,
   @SerialName("seasonCount")
   val seasonCount: Int?,
   @SerialName("placeholderText")
   val placeholderText: UntypedAny?,
   @SerialName("type")
   val type: String,
   @SerialName("continueWatch")
   val continueWatch: UntypedAny?,
   @SerialName("titleId")
   val titleId: String,
   @SerialName("mediaId")
   val mediaId: String?
)

@Serializable
data class Metadata(
   @SerialName("name")
   val name: String,
   @SerialName("contentRatings")
   val contentRatings: List<String>,
   @SerialName("description")
   val description: String,
   @SerialName("duration")
   val duration: Int?,
   @SerialName("category")
   val category: String,
   @SerialName("imdbScore")
   val imdbScore: String?,
   @SerialName("isGainOriginals")
   val isGainOriginals: Boolean,
   @SerialName("isFree")
   val isFree: Boolean,
   @SerialName("images")
   val images: Images,
   @SerialName("tags")
   val tags: List<String>
)

@Serializable
data class Images(
   @SerialName("thumbnails")
   val thumbnails: List<Thumbnail>,
   @SerialName("coverPhotos")
   val coverPhotos: List<CoverPhoto>,
   @SerialName("logos")
   val logos: List<Logo>?
)

@Serializable
data class Thumbnail(
   @SerialName("url")
   val url: String,
   @SerialName("orientation")
   val orientation: String,
   @SerialName("width")
   val width: Int,
   @SerialName("type")
   val type: String
)

@Serializable
data class CoverPhoto(
   @SerialName("url")
   val url: String,
   @SerialName("orientation")
   val orientation: String,
   @SerialName("width")
   val width: Int,
   @SerialName("type")
   val type: String
)

@Serializable
data class Logo(
   @SerialName("url")
   val url: String,
   @SerialName("orientation")
   val orientation: String,
   @SerialName("width")
   val width: Int,
   @SerialName("type")
   val type: String
)

Thank you for reporting this. I have reproduced the problem and created an issue on YouTrack: https://youtrack.jetbrains.com/issue/KTNB-733/JSON-serialization-integration-empty-class-name-generated. We will probably fix it within the next two weeks.

@...  has there any update on this??

Fernandoobregon sorry for the lack of updates. Yes, this issue has been fixed. You need to start the code with %useLatestDescriptors in order for the latest version (which contains the fix) of serialization utils to be used.