BLOCKING BUG: enum in case class fails with "Argument 'xyz' has invalid value: CNil"

[owetterau]

I have a case class which contains an enum for which I use EnumType()and deriveInputObjectType[] to create the schema.

Sangria shows an Argument 'testEnum' has invalid value: CNil when I send something like:

MethodCall(testCaseClass: {
    name: "just a name",
    testEnum: FIRST
  }) {
    result
  }

If I use testEnum as a parameter of a mutation directly, everything works fine. It seems that this problem only appears when an enum is used as part of a case class.

I am using Sangria 2.0.1, Circe 0.13.0 and Sangria-Circe 1.3.1

[nickhudkins]

Hi @owetterau please provide a full sample of the code that is failing and hopefully someone can help you out!

[ThibaultUrien]

I have the exact same issue. Enum field in a case class input object cause this same error. Really anoying as I have no clue how to fix it except implementing a fromInput for all InputObject that use this enum.

[owetterau]

Unfortunately, this issue is still not resolved. Here is a short example of how to recreate the problem:

  sealed trait TestEnum
  case object TestA extends TestEnum
  case object TestB extends TestEnum
  case object TestC extends TestEnum

  final case class Test(id: String, test: TestEnum)

  implicit val TestEnumType = deriveEnumType[TestEnum]()
  implicit val TestObjectType: ObjectType[CallContext, Test] = deriveObjectType[CallContext, Test]()
  implicit val TestInputType: InputObjectType[Test] = deriveInputObjectType[Test](
    InputObjectTypeName("testInput")
  )

  val TestArg = Argument("test", TestInputType)

  Field(
    s"setTest", BooleanType,
    arguments = TestArg :: Nil,
    resolve = ctx => {
      println(ctx arg TestArg)
      true
    }
  )

I am now using Sangria 3.0.0-RC7, Sangria-Circe 1.3.2 and Circe 0.14.1

[yanns]

@owetterau if you want to help, you could prepare a PR, at least one with the test case reproducing the issue?