untrustedSelect 多级动态选择

Area.scala

object Area extends Area with LongKeyedMetaMapper[Area] with CRUDify[Long, Area]{
  override def dbTableName = "area"
}

class Area extends LongKeyedMapper[Area] with IdPK{

  def getSingleton = Area;

  object areaId extends MappedLong(this){
    override def dbColumnName = "area_id";
  }

  object name extends MappedString(this, 32);

  object parentId extends MappedLong(this){
    override def dbColumnName = "parant_id";
  }

  def findAllByParentId(parentId : Long) = Area.findAll(By(Area.parentId, parentId))

}

gistfile1.scala

//<user:province />
//<user:city />

def register = {

   var provinceId = "110000";
   var cityId = "110100";
   def provinceChoice(countryId : Long): Elem = {
      val provinces = Area.findAllByParentId(countryId);
      val seq = (provinces.map(area => (area.areaId.toString(), area.name.toString()))).toSeq.asInstanceOf[scala.collection.Seq[(String,String)]];
      val (name, js) = SHtml.ajaxCall(JE.JsRaw("this.value"), value => After(200, replaceAreas("city", value.toLong)))
      SHtml.untrustedSelect(seq, Full(provinces.head.areaId.toString()), provinceId = _, "id" -> "province","style" -> "width:100px;", "onchange" -> js.toJsCmd)
    }

    def cityChoice(provinceId : Long): Elem = {
      val cities = Area.findAllByParentId(provinceId);
      val seq = (cities.map(area => (area.areaId.toString(), area.name.toString()))).toSeq.asInstanceOf[scala.collection.Seq[(String,String)]];
      SHtml.untrustedSelect(seq, Full(cities.head.areaId.toString()), cityId = _,  "id" -> "city","style" -> "width:100px;")
    }

 def replaceAreas(selectorId : String,  parentId : Long): JsCmd = {
      val areas = Area.findAllByParentId(parentId);
      val list = (areas.map(area => (area.areaId.toString(), area.name.toString()))).toList.asInstanceOf[List[(String,String)]];
      ReplaceOptions(selectorId, list, Full(areas.head.areaId.toString()))
    }

 bind("user",registerXHtml,"province" -> provinceChoice(1L),
      "city" -> (cityChoice(provinceId.toLong)++ SHtml.hidden(() => submitRegister())));

}