Objects as arguments in mutations

[Carlos Dañel Ferreyra]

I'm trying to define a mutation like the following:

case class Department(name: String)

trait Mutation {

  @GraphQLField

  def createDepartment(department: Department): Department = {

    // Not implemented

    department

  }

}

val mutation: Mutation = new Mutation {}

val mutationType: ObjectType[Unit, Unit] = deriveContextObjectType[Unit, Mutation, Unit](_ => mutation)

And I can't find my way pass this error:

Error:(96, 93) Type ssor.model.package.Department @@ sangria.marshalling.FromInput.InputObjectResult cannot be used as an input. Please consider defining an implicit instance of `FromInput` for it.

    val mutationType: ObjectType[Unit, Unit] = deriveContextObjectType[Unit, Mutation, Unit](_ => mutation)

Could anyone give any pointers on way I'm missing?

I couldn't even figure out if I'm missing some implicits or if this is even supported at all to pass objects as arguments in sangria.

Thanks,

Carlos

[Oleg Ilyenko]

you need to define an implicit `InputObjectType` for `Department` and some means to deserialize it from JSON (for instance, if you are using spray-json you need to define a `JsonFormat` for it)

[Carlos Dañel Ferreyra]

I added:

implicit val departmentJF: RootJsonFormat[Department] = jsonFormat1(Department)

implicit val inputDepartmentType: InputObjectType[Department] = deriveInputObjectType[Department](

      InputObjectTypeName("Department"),

      InputObjectTypeDescription("A department"))

Yet the error insists.

I'll try to debug the output of -Xlog-implicits to see what else I'm missing.