scala – 来自select的光滑插入

我使用 scala 2.11和slick 2.1.0并编译代码：

trait TSegmentClient { this: Profile =>

        import profile.simple._

        class SegmentClients(tag: Tag) extends Table[(Int,Long)](tag,"seg") {

            def segmentId = column[Int]("segment_id")
            def clientId = column[Long]("client_id")

            def * = (segmentId,clientId)
        }
    }

    segmentClients.insert(clientBehaviors.map(c => (1,c.clientId)))

有用.

但我需要一个像这样的案例类：

case class SegmentClient(segmentId: Int,clientId: Long)

trait TSegmentClient { this: Profile =>

    import profile.simple._

    class SegmentClients(tag: Tag) extends Table[SegmentClient](tag,"seg") {

        def segmentId = column[Int]("segment_id")
        def clientId = column[Long]("client_id")

        def * = (segmentId,clientId) <> (SegmentClient.tupled,SegmentClient.unapply)
    }
}

segmentClients.insert(clientBehaviors.map(c => (1,c.clientId)))

但它没有编译.

(value: models.coper.datamining.SegmentClient)(implicit session:
scala.slick.jdbc.JdbcBackend#SessionDef)Int cannot be applied to
(scala.slick.lifted.Query[(scala.slick.lifted.Column[Int],
scala.slick.lifted.Column[Long]),(Int,Long),Seq])
segmentClients.insert(clientBehaviors.map(c => (segmentId,c.clientId)))

我的代码出了什么问题？

解决方法

您可以使用另一个投影到未映射到案例类的元组.

case class SegmentClient(segmentId: Int,"seg") {

        def segmentId = column[Int]("segment_id")
        def clientId = column[Long]("client_id")
        def tuple = (segmentId,clientId) 
        def * = tuple <> (SegmentClient.tupled,SegmentClient.unapply)
    }
}

segmentClients.map(_.tuple).insert(clientBehaviors.map(c => (1,c.clientId)))