How to access context value in InterceptOperation created in InterceptField

[livictoria]

What happened?

I'm experimenting with the graphql extensions. In the InterceptOperation hook once operation is completed, I would like to retrieve a value I added in the ctx object from InterceptField. i.e.

func (a *Tracer) InterceptField(ctx context.Context, next graphql.Resolver) (res interface{}, err error) {
        fc := graphql.GetFieldContext(ctx)

        // Adding "testValue" keyed by testKey to the context
       if fc.Path().String() == path {
	    ctx = context.WithValue(ctx, testKey, "testValue")
        }

	res, err = next(ctx)
	return res, err
}

And in InterceptOperation..

func (a *Tracer) InterceptOperation(ctx context.Context, next graphql.OperationHandler) graphql.ResponseHandler {
	handler := next(ctx)

	return func(resCtx context.Context) *graphql.Response {
		response := handler(resCtx)

               // This does not have context.testKey
		fmt.Printf("res context=%v\n", resCtx.Value(testKey))
		return response
	}
}

But resCtx.Value(testKey) returns nil. But in the resolvers, I am able to see testValue from resCtx.Value(testKey). Why is it not possible for the context object in the InterceptOperation response to include the ctx values created in the InterceptField hook?

What did you expect?

Minimal graphql.schema and models to reproduce

versions

• gqlgen version v.11.3
• go version? 1.16
• dep or go modules?