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@cvogt cvogt/gist:9519186
Created Mar 12, 2014

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Nested entity mapping with Slick 1.x
case class Part1(i1: Int, i2: String)
case class Part2(i1: String, i2: Int)
case class Whole(p1: Part1, p2: Part2)
class Tuple2Mapper[Entity,Component1,Tuple1,Component2,Tuple2](
entityFactory: (Component1,Component2) => Entity,
entityExtractor: Entity => Option[(Component1,Component2)],
component1factory: Tuple1 => Component1,
component1extractor: Component1 => Option[Tuple1],
component2factory: Tuple2 => Component2,
component2extractor: Component2 => Option[Tuple2]
){
def apply( tuple1: Tuple1, tuple2: Tuple2 ) =
entityFactory(component1factory(tuple1), component2factory(tuple2))
def unapply(entity: Entity) = entityExtractor(entity).map(tuple => (
component1extractor(tuple._1).get,
component2extractor(tuple._2).get
))
}
object WholeMapper extends Tuple2Mapper(
Whole,
Whole.unapply,
Part1.tupled,
Part1.unapply,
Part2.tupled,
Part2.unapply
)
object T extends Table[(Int,String,String,Int)]("t_nested") {
def p1 = column[Int]("p1")
def p2 = column[String]("p2")
def p3 = column[String]("p3")
def p4 = column[Int]("p4")
def * = p1 ~ p2 ~ p3 ~ p4
def nested = ((p1,p2), (p3,p4))
}
val data = Seq(
Whole(
Part1(1, "2"),
Part2("3", 4)
)
)
T.ddl.create
T.nested.shaped.insertAll(data.map(WholeMapper.unapply(_).get):_*)
assertEquals(data, Query(T).map(_.nested).run.map((WholeMapper.apply _).tupled))
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