How does one specify that a certain resolver returns I union type. I see how to define a type in the docs but not how to use it

Hi, Sorry for being so inactive the latetly. I will be more active in this project soon again 🙂 I have updated the docs for union types with a bit more example code: https://kgraphql.io/Reference/Type%20System/unions/ Currently there is one common use case that is not supported which is using non sealed classes union types within query definitions. Other than this everything should work.

I see. I am trying to return either the error or an object based on the union type above. However when I build I still get this error.

these screenshots do not show where you are trying to return your union type. But by the error you are getting it seems you are using the

query

. Which I mentioned currently is not supported 😞

sorry here us the full operation

Sorry I mean both

query

and

mutation

are not supported as they are both using the same DSL implementation. Currently a workaround is required to make something like this work. Which is to change the

EncodedTokens

and

ServerError

to a Kotlin Sealed class.