Cannot generate schema for sealed trait with enum implementors

[anqit]

I'm trying to use zio-schema with zio-http to de/serialize request/response Bodys. I have a sealed trait representing the response body of my API, and two implementors of that trait, both of which are enums, representing success bodies (with a "data" field) and failure bodies (with a "message" field), but cannot seem to generate a schema for this structure. The below scala-cli script is a minimal representation of what I've tried. This compiles but fails at runtime with a ClassCastException:

//> using dep dev.zio::zio:2.1.1
//> using dep dev.zio::zio-http:3.0.0-RC8

import zio.schema.{ DeriveSchema, Schema, TypeId }
import zio.schema.Schema.Sequence
import zio.schema.codec.BinaryCodec
import zio.schema.codec.JsonCodec.schemaBasedBinaryCodec
import zio.http.*

sealed trait HttpResponse[+D]

enum HttpSuccessResponse[+D](val data: D) extends HttpResponse[D]:
   case Created[E](entity: E) extends HttpSuccessResponse[E](entity)
   case Found[E](entity: E) extends HttpSuccessResponse[E](entity)
   case Updated[E](entity: E) extends HttpSuccessResponse[E](entity)
   case Deleted[E](entity: E) extends HttpSuccessResponse[E](entity)
   case Succeeded[E](entity: E) extends HttpSuccessResponse[E](entity)

enum HttpFailureResponse(val message: String) extends HttpResponse[String]:
   case ServerError(msg: String) extends HttpFailureResponse(msg)
   case RequestError(msg: String) extends HttpFailureResponse(msg)

given HttpSuccessResponseSchema[D](using Schema[D]): Schema[HttpSuccessResponse[D]] = DeriveSchema.gen

given HttpFailureResponseSchema: Schema[HttpFailureResponse] = DeriveSchema.gen

given HttpResponseSchema[D](using Schema[D]): Schema[HttpResponse[D]] = DeriveSchema.gen

val response = HttpSuccessResponse.Created("user")

val body = Body.from(response)

@main def run() =
   println(body.asString)

The full error is

Exception in thread "main" java.lang.ExceptionInInitializerError
        at run.main(error_repro.scala:34)
Caused by: java.lang.ClassCastException: class zio.schema.Schema$CaseClass1$$anon$7 cannot be cast to class zio.schema.Schema$CaseClass0 (zio.schema.Schema$CaseClass1$$anon$7 and zio.schema.Schema$CaseClass0 are in unnamed module of loader 'app')
        at zio.schema.codec.JsonCodec$JsonEncoder$.$anonfun$2(JsonCodec.scala:388)
        at zio.Chunk$Arr.mapChunk(Chunk.scala:1769)
        at zio.ChunkLike.map(ChunkLike.scala:121)
        at zio.ChunkLike.map$(ChunkLike.scala:39)
        at zio.Chunk.map(Chunk.scala:42)
        at zio.schema.codec.JsonCodec$JsonEncoder$.enumEncoder(JsonCodec.scala:389)
        at zio.schema.codec.JsonCodec$JsonEncoder$.schemaEncoder(JsonCodec.scala:205)
        at zio.schema.codec.JsonCodec$JsonEncoder$.encode(JsonCodec.scala:177)
        at zio.schema.codec.JsonCodec$$anon$2.encode(JsonCodec.scala:93)
        at zio.schema.codec.JsonCodec$$anon$2.encode(JsonCodec.scala:92)
        at zio.http.Body$.from(Body.scala:209)
        at error_repro$package$.<clinit>(error_repro.scala:13)

Am I just doing this incorrectly or is this something not supported?

[anqit]

potentially related to https://github.com/zio/zio-schema/issues/668 ?

[jdegoes]

/bounty $100

[algora-pbc[bot]]

💎 $100 bounty • ZIO

Steps to solve:

1. Start working: Comment /attempt #697 with your implementation plan
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Attempt	Started (GMT+0)	Solution
🟢 @pablf		#707

[anqit]

I'm guessing an assigned bounty means that what I'm trying to do is indeed unsupported at this time? I was hoping I was just doing something wrong...

[algora-pbc[bot]]

💡 @pablf submitted a pull request that claims the bounty. You can visit your bounty board to reward.

[algora-pbc[bot]]

🎉🎈 @pablf has been awarded $100! 🎈🎊

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