Codegen creates extra code on INPUT_OBJECT directive when using nested input fields?

[worldisaduck]

What happened?

I have following gql schema:

with schema below when I run code gen it creates unmarshaling function with directive function call for flightable_place and non_flightable_place fields which passes parent input object(destination) to my OneOf implementation function, which it should do, but also it does the same for destination field and passes it's parent input object which is main DirectionInput input object to OneOf directive implementation, which it shouldn't because it doesn't make any sense and oneOf directive doesn't get called on DirectionInput

What did you expect?

Am I doing something wrong and what should I expect from following schema?

Minimal graphql.schema and models to reproduce

directive @oneOf on INPUT_OBJECT

input Destination @oneOf {
    flightable_place: FlightablePlace
    non_flightable_place: NonFlightablePlace
}

input FlightablePlace {
    iata: String!
}

input NonFlightablePlace {
    uuid: String!
}

input DirectionInput {
    destination: Destination!
    some_field: String
    some_field2: Int
}

type Query {
   direction(input: QueryInput!): Direction
}

type Direction {
    origin: String
    destination: String
}

versions

• github.com/99designs/gqlgen v0.17.45
• 1.22.1

[worldisaduck]

in other words, codegen generates directive call as if there was @oneOf directive on DirectionInput as well

input DirectionInput @oneOf {
    destination: Destination!
    some_field: String
    some_field2: Int
}