我应该如何在Scala和Anorm中使用MayErr [IntegrityConstraintViolation，Int]？

MayErr[IntegrityConstraintViolation,Int]

val result = SQL(\"delete from City where id = 99\").executeUpdate().fold( 
    e => \"Oops, there was an error\" , 
    c => c + \" rows were updated!\"
)

result

SQL(
\"\"\"
INSERT INTO users (firstname, lastname) VALUES ({firstname}, {lastname})
\"\"\"
).on(\"firstname\" -> user.firstName, \"lastname\" -> user.lastName)
    .executeUpdate().fold(
            e => \"Oops, therw was an error\",
            c => c + \" rows were updated!\"
)

val updateResult = ....executeUpdate()
val success = updateResult.fold(e => false, c => true)

val success = updateResult.isRight

updateResult.e match {
    case Left(error) => ... do something with error ...
    case Right(updateCount) => ...do something with updateCount...
}

MayErr

Either

e

MayErr[IntegrityConstraintViolation,Int]

Either[IntegrityConstraintViolation,Int]