Would that be

@strawberry.mutations.oneOf()
def foo(arg1: Optional[str], arg2: Optional[int]):
    ...

or use enums like async-graphql?

Any progress on that? It seems the PR is open and ready but no one approves it :(

@Aponace while the PR adds the directive, it doesn't add runtime support for it, we'd need to implement that to make it work 😊

@patrick91 I'm interested in implementing this!

It seems like we could take #2560 to add @oneOf as a schema directive, and maybe we could add a ValidationRule that is added to all schemas? Since this directive would apply on execution, feels more appropriate for a "native" extension or something similar to operation directives.

Seems like the logic is straightforward, just not 100% sure on where the implementation should live.