Slick: Return inserted row with auto increment id - mysql

Question

I'm trying to make an insert into a MySQL table and to return the row with the auto increment id. My code is below:
private val Log = TableQuery[GCMLogTable]
def save(log: GCMLog): Try[GCMLog] = Try {
val newId = (Log returning Log.map(_.id)) += log
log.copy(id = newId)
}
But my compilation fails for my code with the below error:
type mismatch;
found : slick.profile.FixedSqlAction[Long,slick.dbio.NoStream,slick.dbio.Effect.Write]
required: Long
Also tried
def save(log: GCMLog): Try[GCMLog] = Try {
(Log returning Log.map(_.id)
into ((log, newId) => log.copy(id = newId))
) += log
}
But still fails with
type mismatch;
found : slick.profile.FixedSqlAction[models.GCMLog,slick.dbio.NoStream,slick.dbio.Effect.Write]
required: models.GCMLog
[I referred the SO question How to catch slick postgres exceptions for duplicate key value violations and Slick documentation here http://slick.typesafe.com/doc/3.1.1/queries.html ]
Much appreciated if someone can tell me what's going on and how this can be fixed.
Thanks!

Answer 1

def save(log: GCMLog): Try[GCMLog] = Try {
(Log returning Log.map(_.id))
into ((log, newId) => log.copy(id = newId))
) += log
}
UPDATE:
It looks db.run needs to be perform to convert that Action into result.

Answer 2

slick supports it:
def create(objectToCreate: MyCaseClass): MyCaseClass = {
db.withSession {
(self returning self) += objectToCreate
}
}

Answer 3

Try this
private val Log = TableQuery[GCMLogTable]
private val db = Database.forConfig("mysql")
def save(log: GCMLog): Try[GCMLog] = Try {
val newId = db.run((Log returning Log.map(_.id) into ((Log,id) => Log.copy(id=id))) += log)
Await.result(newId, Duration.Inf)
}