I'm trying to filter against an optional date column with Scala Slick 1.0.1.
It may be I just don't see it, but I've got a table that looks something like this:
case class UserRole(id:UUID, userID:UUID, role:String)
object UserRole extends Table[UserRole]("User_Role") {
//(id: Long = 0l, name: String, active: Boolean) extends KeyedEntity[Long] {
def id = column[UUID]("ID", O.PrimaryKey)
def userID = column[UUID]("user_id")
def vendorID = column[UUID]("vendor_id")
def role = column[String]("role")
def user = foreignKey("user_FK", userID, User)(_.id)
def start = column[java.sql.Date]("startDate")
def endDate = column[Option[java.sql.Date]]("endDate")
def * = id ~ userID ~ role <> (UserRole.apply _, UserRole.unapply _)
}
You'll see there that the endDate is optional.
How do I construct a query where I filter so endDate can be NULL/None or greater than the current (db) date? FYI, I'm generally using the embedded api
thanks
This is not pretty (the part about null.asInstanceOf
), but I think it will work. I got that idea from an old Scala Query post, so I don't know if slick ever put something better in for that, but when I looked at the resulting selectStatement
from the query, it looked correct:
val now = new java.sql.Date(System.currentTimeMillis())
val query = for {
role <- UserRole
if (role.endDate === null.asInstanceOf[Option[java.sql.Date]] || role.endDate > now)
} yield role
EDIT
Thanks to the comment by @MartinKolinek, this code will also work and is much cleaner and probably the better way to do things:
val now = new java.sql.Date(System.currentTimeMillis())
val query = for {
role <- UserRole
if (role.endDate.isNull || role.endDate > now)
} yield role