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.

Arkadiy Bazhanov  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.