I'm thinking about having my query response types use functions to load data as needed. For example:

data class SomeSuccessType(
  val foo: Foo,
  @property:GraphQLIgnore val bar: suspend () -> Bar?,
) {
  suspend fun bar() = bar.invoke()
}

With this approach my data model does not need to know anything about the various services and such being used to look up this data (like in the example given at https://opensource.expediagroup.com/graphql-kotlin/docs/server/data-loaders, the model class needs a reference to

friendService

and

userService

, which I think is messy to say the least). Instead, the loader logic here exists outside the data class/model and is simply injected via a function. However, when trying this approach, I am confronted with:

Exception in thread "main" kotlin.reflect.jvm.internal.KotlinReflectionInternalError: Cannot calculate JVM erasure for type: suspend () -> Bar?
  at kotlin.reflect.jvm.KTypesJvm.getJvmErasure(KTypesJvm.kt:36)
  at com.expediagroup.graphql.generator.internal.extensions.KTypeExtensionsKt.getKClass(kTypeExtensions.kt:38)
  at com.expediagroup.graphql.generator.internal.extensions.KTypeExtensionsKt.getQualifiedName(kTypeExtensions.kt:73)
  ...

Any work-around for this? If not, what other techniques are people using to do data loading without all the messiness?

if making it

private

works then it sounds like a bug

Thanks for the confirmation. I've created https://github.com/ExpediaGroup/graphql-kotlin/issues/1364.