Skinny-ORM. Eager loading (Bad example). #includes

Main.scala

object Person extends SkinnyCRUDMapper[Person] {
  override def defaultAlias = createAlias("person")

  override def extract(rs: WrappedResultSet, n: ResultName[Person]): Person = new Person(
    id = rs.get(n.id),
    name = rs.get(n.name)
  )

  val companyRef =
    belongsTo[Company](Company, (p, c) => p.copy(company = c))
      .includes[Company](
        merge = (persons, companies) => persons.map { p =>
          p.company match {
            case Some(x) =>
              p.copy(company = Some(x.copy(companyType = x.companyTypeId.flatMap(CompanyType.findById))))
            case None => p
          }
        }
      )
}

memo : このEager loadingはダメな方法です。
こちらを参考にしてください。
https://github.com/tsukaby/skinny-orm-example