将Rep [Option [ZonedDateTime]]与ZonedDateTime进行比较

Question

I'm trying to compare ZonedDateTime with following code:

val now = ZonedDateTime.now()

val query = for {
  x <- xTable.query if x === id
  if x.starts.isAfter(now) // Doesn't work
} yield x

...slick.run(query.result)

But it seems that I can't access .isAfter because x.starts is Rep[Option[...]] , is there a better way to do what I'm trying to achieve?

Answer 1

From what you've described, it sounds like a suitable column type mapping might be missing. For date/time schemas , Slick only supports JDBC-based java.sql.{Date, Time, Timestamp} . You would need an implicit mapper in scope wherever ZonedDateTime is used. The mapper should look something like below:

import java.sql.Timestamp
import java.time.ZonedDateTime
import scala.slick.driver.JdbcProfile.MappedColumnType

implicit val zonedDateTimeMapper = MappedColumnType.base[ZonedDateTime, Timestamp](
  zdt => Timestamp.from(zdt.toInstant),
  ts => ZonedDateTime.ofInstant(ts.toInstant, ZoneOffset.UTC)
)