Trying to figure out how to write delete queries in ScalaQuery/SLICK

error

! Internal server error, for request [GET /tasks/1/delete?] ->

sbt.PlayExceptions$CompilationException: Compilation error [could not find implicit value for parameter om: org.scalaquery.ql.OptionMapper2[Int,Int,Boolean,Int,Long,R]]
        at sbt.PlayReloader$$anon$2$$anonfun$reload$3$$anonfun$4$$anonfun$apply$12$$anonfun$apply$13.apply(PlayReloader.scala:236) ~[na:na]
        at sbt.PlayReloader$$anon$2$$anonfun$reload$3$$anonfun$4$$anonfun$apply$12$$anonfun$apply$13.apply(PlayReloader.scala:236) ~[na:na]
        at scala.Option.map(Option.scala:133) ~[scala-library.jar:0.11.3]
        at sbt.PlayReloader$$anon$2$$anonfun$reload$3$$anonfun$4$$anonfun$apply$12.apply(PlayReloader.scala:236) ~[na:na]
        at sbt.PlayReloader$$anon$2$$anonfun$reload$3$$anonfun$4$$anonfun$apply$12.apply(PlayReloader.scala:233) ~[na:na]
        at scala.Option.map(Option.scala:133) ~[scala-library.jar:0.11.3]

gistfile1.scala

object TaskT extends BasicTable[(Int, String)]("task") {
  def id = column[Int]("id")
  def label = column[String]("label")

  def * = id ~ label
}


object TaskSQ {
  lazy val database = Database.forDataSource(DB.getDataSource())

  def delete(id: Long) { database withSession {
      (for(t <- TaskT if(t.id is id)) yield t).delete
    }
  }
}