Validating objects during a db save using `Try`

Employee.scala

case class Employee(id: Option[Long] = None, name: String, age: Int, salary: Int)

object EmployeeRepo {
  private def persist(employee: Employee): Employee = {
    // persisting logic
    employee.copy(id = Some(10L)) // database returns persisted id, return new object with id set
  }
  def save(employees: Seq[Employee])(implicit validator: Employee => Try[Employee]): Seq[Try[Employee]] = {
    employees.map(validator(_).map(persist))
  }
}

sealed trait ValidationException extends Throwable { val message: String }
case class BadNameException(message: String) extends ValidationException

implicit val employeeValidator = { employee: Employee => 
  // validate your object, returning a Success or Failure
  if(employee.name == "George") Failure(BadNameException("No George's allowed"))
  else Success(employee)
}

val employeesToPersist: Seq[Employee] = ...

EmployeeRepo.save(employeesToPersist) // : Seq[Try[Employee]], which you can iterate through and deal with problems.

// http://www.scala-lang.org/archives/downloads/distrib/files/nightly/docs/library/index.html#scala.util.Try