如何在 slick 3.0 的过滤器上比较 column[option[DateTime] 与 DateTime.now

Question

我有下一个问题..

我使用 spray.http.DateTime，我的映射器是：

  implicit val JavaUtilDateTimeMapper =
    MappedColumnType.base[DateTime, Timestamp] (
      d => new Timestamp(d.clicks),
      d => spray.http.DateTime(d.getTime))


 case class EventosModelTable(
  id: Option[Long],
  idCliente: Option[Long],
  idPlan: Option[Long] = None,
  idServicio: Option[Long] = None,
  tipo: TipoEventos.Value,
  fechaInicio: DateTime,
  fechaFin: Option[DateTime]
) extends BaseModel

class EventosTabla(tag: Tag) extends Table[EventosModelTable](tag, "eventos") with BaseTabla{

  override def id = column[Long]("id", O.PrimaryKey, O.AutoInc)
  def idCliente = column[Long]("id_cliente")
  def idPlan = column[Option[Long]]("id_plan")
  def idServicio = column[Option[Long]]("id_servicio")
  def tipo = column[TipoEventos.Value]("tipo_evento")
  def fechaInicio = column[DateTime]("fecha_inicio")
  def fechaFin = column[Option[DateTime]]("fecha_fin")

  def * = (id.?,idCliente.?,idPlan,idServicio,tipo,fechaInicio,fechaFin) <> (EventosModelTable.tupled, EventosModelTable.unapply _)

  def cliente = foreignKey("cliente",idCliente,TableQuery[ClientesTabla])(_.id)
  def plan = foreignKey("plan",idPlan,TableQuery[PlanesTabla])(_.id)
}

然后..我需要找到事件的 fechaFin 为 Null 或 fechaFin> DateTime.now... 但问题是 fechaFin 可以是 Null 然后是一个 Option 值，我无法与 DateTime.now 进行比较。编译错误是 Some[DateTime] 没有 > 方法。

我将不胜感激任何帮助

查询如下..

def getAltasBajas(id : Long) : DBIOAction[Seq[EventosModelTable],NoStream,Effect.All] = {

      val q = for {
        altasBajas <- tabla.filter(_.idCliente === id)
            if altasBajas.fechaFin.isEmpty || (altasBajas.fechaFin.isDefined && (altasBajas.fechaFin)<(DateTime.now))
      }yield altasBajas

      q.result
    }

Answer 1

我发现这个 answer 表明您的实施应该有效（至少据我所知）或者您可以尝试

val q = for {
  altasBajas <- tabla.filter(_.idCliente === id)
  if !altasBajas.fechaFin.isNull || altasBajas.fechaFin < DateTime.now
} yield altasBajas

如何在 slick 3.0 的过滤器上比较 column[option[DateTime] 与 DateTime.now

How can compare column[option[DateTime] with DateTime.now on a filter of slick 3.0

datetime

scala

slick-3.0