相关疑难解决方法(0)

我有嵌套的类/对象,并希望使用SLICK在数据库中存储(和检索)它们.据我所知,使用SLICK映射投影将是关键.此外,我使用伴侣对象在嵌套对象和平面结构之间进行映射(存储在DB表中).我想做这样的事情(简化示例):

case class Foo(id: Int, myBar: Bar)

case class Bar(myInt: Int, myString: String)

object Foo {
  def apply(id: Int, myInt: Int, myString: String): Foo = Foo(id, Bar(myInt, myString))

  override def unapply(f: Foo) = (f.id, f.myBar.myInt, f.myBar.myString)
}

object TTable extends Table[Foo]("FOO") {
    def id = column[Int]("id",  O.PrimaryKey)
    def myInt = column[Int]("myInt", O NotNull)
    def myString = column[String]("myString", O NotNull)

    def * = id ~ myInt ~ myString <> (Foo.apply _, Foo.unapply _)

    def query(db: Database, id: Int): Option[Foo] = db …