Cannot query nested documents (Line #39)

ReactiveMongoTest.scala

package reactivemongotest

import scala.concurrent.Await
import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.Future
import scala.concurrent.duration.DurationInt
import org.junit.Test
import reactivemongo.api.MongoConnection
import reactivemongo.bson.BSONDocument
import reactivemongo.bson.BSONInteger
import reactivemongo.bson.BSONString
import reactivemongo.bson.handlers.DefaultBSONHandlers.DefaultBSONDocumentReader
import reactivemongo.bson.handlers.DefaultBSONHandlers.DefaultBSONDocumentWriter
import reactivemongo.bson.handlers.DefaultBSONHandlers.DefaultBSONReaderHandler
import scala.util.Failure
import scala.util.Success
import reactivemongo.core.commands.LastError
import reactivemongo.bson.BSONElement

class ReactiveMongoTest {

  @Test
  def someTest() {
    import scala.concurrent.ExecutionContext.Implicits.global

    val connection = MongoConnection(List("localhost:27017"))
    val db = connection("test")
    val collection = db("vertx-test")
    val document = BSONDocument(
      "nickname" -> BSONString("Tester"),
      "data" -> BSONDocument(
        "age" -> BSONInteger(15),
        "address" -> BSONString("Fakestreet 123")))

    val somePointInFuture = (collection.insert(document) flatMap {
      lastError =>
        println("lastError: " + lastError)
        // The query does not work for nested data
        val query = document //BSONDocument("data.age" -> BSONInteger(15))
        val filter = BSONDocument("nickname" -> BSONInteger(1))

        println("This shows up!")
        val cursor = collection.find(query, filter)
        println("This shows up now, too!")

        cursor.toList
    } andThen {
      case Success(cursorList) =>
        println("another success! = " + cursorList)
        for (result <- cursorList) yield result
      case Failure(f) =>
        println("uh oh, error: " + f)
    })

    val res = Await.result(somePointInFuture, 15 seconds)
    for (doc <- res) {
      println(doc.get("nickname"))
    }
    println("done")
  }
}