Scala / Slick 3.0.1 - Update Multiple Columns - scala

Question

Whenever I get an update request for a given id , I am trying to update the masterId and the updatedDtTm columns in a DB table( I don't want to update my createdDtTm). The following is my code :
case class Master(id:Option[Long] = None,masterId:String,createdDtTm:Option[java.util.Date],
updatedDtTm:Option[java.util.Date])
/**
* This is my Slick Mapping table
* with the default projection
*/
`class MappingMaster(tag:Tag) extends
Table[Master](tag,"master") {
implicit val DateTimeColumnType = MappedColumnType.base[java.util.Date, java.sql.Timestamp](
{
ud => new Timestamp(ud.getTime)
}, {
sd => new java.util.Date(sd.getTime)
})
def id = column[Long]("id",O.PrimaryKey,O.AutoInc)
def masterId = column[String]("master_id")
def createdDtTm = column[java.util.Date]("created_dttm")
def updatedDtTm = column[java.util.Date]("updated_dttm")
def * = (id.? , masterId , createdDtTm.? , updatedDtTm.?) <>
((Master.apply _).tupled , Master.unapply _) }
/**
* Some where in the DAO update call
*/
db.run(masterRecords.filter(_.id === id).map(rw =>(rw.masterId,rw.updatedDtTm)).
update(("new_master_id",new Date()))
// I also tried the following
db.run(masterRecords.filter(_id === id).map(rw => (rw.masterId,rw.updatedDtTm).shaped[(String,java.util.Date)]).update(("new_master_id",new Date()))
The documentation of Slick states that inorder to update multiple columns one needs to use the map to get the corresponding columns and then update them.
The problem here is the following - the update method seems to be accepting a value of Nothing.
I also tried the following which was doing the same thing as above:
val t = for {
ms <- masterRecords if (ms.id === "1234")
} yield (ms.masterId , ms.updateDtTm)
db.run(t.update(("new_master_id",new Date())))
When I compile the code , it gives me the following Compilation Exception :
Slick does not know how to map the given types.
[error] Possible causes: T in Table[T] does not match your * projection. Or you use an unsupported type in a Query (e.g. scala List).
[error] Required level: slick.lifted.FlatShapeLevel
[error] Source type: (slick.lifted.Rep[String], slick.lifted.Rep[java.util.Date])
[error] Unpacked type: (String, java.util.Date)
[error] Packed type: Any
[error] db.run(masterRecords.filter(_id === id).map(rw => (rw.masterId,rw.updatedDtTm).shaped[(String,java.util.Date)]).update(("new_master_id",new Date()))
I am using Scala 2.11 with Slick 3.0.1 and IntelliJ as the IDE. Really appreciate if you can throw some light on this.
Cheers,
Sathish

Answer 1

(Replaces original answer) It seems the implicit has to be in scope for the queries, this compiles:
case class Master(id:Option[Long] = None,masterId:String,createdDtTm:Option[java.util.Date],
updatedDtTm:Option[java.util.Date])
implicit val DateTimeColumnType = MappedColumnType.base[java.util.Date, java.sql.Timestamp](
{
ud => new Timestamp(ud.getTime)
}, {
sd => new java.util.Date(sd.getTime)
})
class MappingMaster(tag:Tag) extends Table[Master](tag,"master") {
def id = column[Long]("id",O.PrimaryKey,O.AutoInc)
def masterId = column[String]("master_id")
def createdDtTm = column[java.util.Date]("created_dttm")
def updatedDtTm = column[java.util.Date]("updated_dttm")
def * = (id.? , masterId , createdDtTm.? , updatedDtTm.?) <> ((Master.apply _).tupled , Master.unapply _)
}
private val masterRecords = TableQuery[MappingMaster]
val id: Long = 123
db.run(masterRecords.filter(_.id === id).map(rw =>(rw.masterId,rw.updatedDtTm)).update("new_master_id",new Date()))
val t = for {
ms <- masterRecords if (ms.id === id)
} yield (ms.masterId , ms.updatedDtTm)
db.run(t.update(("new_master_id",new Date())))