Convert JOOQ results to a Map

Question

I am developing a Web API using Scala with Scalatra and JOOQ. I would like to deal with Maps instead of Records, Case Classes etc

Using JacksonJsonSupport to automatically serialize my data to JSON :

get("/test") {

    val r = DBManager.query select(MODULE.ID, MODULO.NAME) from MODULE fetchArrays

    Map("result" -> r)
}

hitting 0.0.0.0:8080/test produces the following output:

{"result":[[1,"VelanRT"],[2,"GeobodyMorphologicalConvolution"], [3,"Sismofacies"]}

but, if using fetchMaps instead of fetchArrays :

{"result":[{},{},{}]}

what I expected is a Map[String, AnyVal], with the column name as the key and the value being the DB tuple value

Is there any additional setup I need to do? I there a chance that the json serialization from JacksonSupport is messing with things?