update_values.scala

  /** Updates all of the given ts in the database */
  def updateAll(ts: Seq[T]): Future[Seq[T]] = {
    val query = findAll(ts)
    val actions = ts.map(t => query.update(t))
    val affectedRows: Future[Seq[Int]] = database.run(DBIO.sequence(actions))
    val updatedTs = findAll(ts)
    affectedRows.flatMap { _ =>
      database.run(updatedTs.result)
    }
  }