Given the following Person
SQL and model code:
SQL
CREATE TYPE sex AS ENUM ('male', 'female');
CREATE TABLE person (
id bigserial primary key,
name varchar(100) NOT NULL,
age integer NOT NULL,
gender sex NOT NULL );
Code
object Person {
sealed trait Gender
case object Male extends Gender
case object Female extends Gender
// credit to Travis Brown: http://stackoverflow.com/a/30946172/409976
implicit val GenderShows: Show[Gender] = Show.shows {
case Male => "male"
case Female => "female"
}
}
case class Person private(id: Option[Long], name: String, age: Int, gender: Person.Gender)
I wrote the following object for creating a Person
:
object PostgresRepository {
val xa = DriverManagerTransactor[IO](
"org.postgresql.Driver", "jdbc:postgresql:person", "postgres", "postgres"
)
def insert1(name: String, age: Int, gender: Gender) =
sql"insert into person (name, age, gender) values
($name, $age,
${implicitly[Show[Gender]].shows(gender)})".update.run.transact(xa)
}
Then, I ran sbt console
, and tried to insert:
scala> PostgresRepository.insert1("foo", 3, net.phone.model.Person.Male)
res0: scalaz.effect.IO[Int] = scalaz.effect.IOFunctions$$anon$6@2697b43b
scala> res0.unsafePerformIO
org.postgresql.util.PSQLException: ERROR: column "gender" is of type sex but expression is of type character varying
Hint: You will need to rewrite or cast the expression.
Position: 56
As the exception already suggested, you need to cast the enum value expression.