Asynchronous transaction handling in mutiny/jooq

Question

I am trying to save two objects in a single transaction. On error, I would like my transaction to roll back.

Here is the current attempt:

public Uni<Response> save(...) {
return Uni
    .createFrom()
    .completionStage(dslContext.transactionResultAsync(configuration -> repo
        .insert(... , configuration.dsl())
        .flatMap(dataRecord -> Uni
            .createFrom()
            .publisher(configuration
                .dsl()
                .insertInto()
                .set()
                .returning())
            .map(ignore -> Response
                .builder()
                .build()))))
    .flatMap(i -> i);

with repo.insert looking like:

Uni<DataRecord> insert(..., DSLContext dslContext) {
return Uni
    .createFrom()
    .publisher(dslContext
        .insertInto()
        .set()
        .returning())
    .map(dataRecord -> new DataRecord()
        .set(...))));

The configuration is based on quarkus-jooq custom context version 2.0, with two additions:

settings.setBindOffsetDateTimeType(true);
settings.setRenderSchema(true);

However. there is no rollback happening in case the second insert fails (I forced it by violating a not null constraint). I see the exception in my test. I also see the first object. So what would do the trick?