how would i use that trait? with MyLogger[MyModel, MyModel] ? What is A and what is K supposed to be?
On 30 Jul., 00:55, David Pollak <feeder.of.the.be...@gmail.com> wrote: > It's not pretty, but: > > trait MyLogger[A <: KeyedMapper[K, A], K] extends KeyedMetaMapper[K,A] { > self: A with MetaMapper[A] with KeyedMapper[K, A] => > > override def afterSave = doSomething _ :: super.afterSave > > private def doSomething(in: A) { > println("Got "+in) > } > > > > } > On Wed, Jul 29, 2009 at 3:35 PM, fbettag <fr...@bett.ag> wrote: > > > Hm. i changed it to this: > > trait Stamped[OwnerType <: Mapper[OwnerType] with IdPK] { > > self: MetaMapper[OwnerType] => > > > private val thisTyped = this.asInstanceOf[MapperType] > > > override def afterSave: List[Any] = { > > createActionLog("create", this.getClass.toString, > > thisTyped.id) > > return List(None) > > } > > > def afterUpdate: List[Any] = { > > createActionLog("update", this.getClass.toString, > > thisTyped.id) > > return List(None) > > } > > > def beforeDelete: List[Any] = { > > createActionLog("delete", this.getClass.toString, > > thisTyped.id) > > return List(None) > > } > > > private def createActionLog(action: String, klass: String, obj: > > Long) > > { > > val log = new ActionLog > > log.action(action).klass(klass).record(obj).save > > } > > > } > > > and i extend the object now and not the class. still i get these: > > > src/main/scala/ag/bett/lift/cms/lib/Stamped.scala:12: error: method > > afterSave overrides nothing > > override def afterSave: List[Any] = { > > ^ > > method afterSave in trait Stamped of type => List[Any] needs > > `override' modifier > > object Content extends Content with LongKeyedMetaMapper[Content] with > > Stamped[Content] { > > ^ > > > This is voodoo again :( > > > On 29 Jul., 22:55, David Pollak <feeder.of.the.be...@gmail.com> wrote: > > > trait Foo[A <: Mapper[A]] { > > > self: MetaMapper[A] => > > > > } > > > On Wed, Jul 29, 2009 at 1:38 PM, fbettag <fr...@bett.ag> wrote: > > > > > Yes thanks, it gives me an idea of the issue which i now see. > > > > Could you provide a very simple example on how you would make the Meta- > > > > Mixin? > > > > That would be very good > > > > > best regards > > > > > On 29 Jul., 21:55, David Pollak <feeder.of.the.be...@gmail.com> wrote: > > > > > On Tue, Jul 28, 2009 at 5:12 PM, fbettag <fr...@bett.ag> wrote: > > > > > > > So far it looks like this: > > > > > > > trait Stamped[OwnerType <: Stamped[OwnerType] with LongKeyedMapper > > > > > > [OwnerType] with IdPK] { > > > > > > this: OwnerType => > > > > > > > private val thisTyped = this.asInstanceOf[MapperType] > > > > > > > override def afterSave { > > > > > > createActionLog("create", this.getClass.toString, > > > > this.id) > > > > > > } > > > > > > There's no afterSave method on Mapper... that method is on > > MetaMapper. > > > > > > You need to split your trait into two pieces... one that will be > > mixed > > > > into > > > > > the model instances and one that'll be mixed into the Meta model > > > > singleton > > > > > (or perhaps just one mixed into the Meta). > > > > > > In terms of the afterSave (and other before and after stuff) method > > on > > > > > MetaMapper, that method returns a List of functions that take the > > > > instance > > > > > as a model that's being saved and does something. I've changed the > > > > > signature to List[A => Unit] rather than List[A => Any] to avoid > > > > confusion > > > > > about the fact that the functions are not meant to return anything. > > > > > > Does this help? > > > > -- > > > Lift, the simply functional web frameworkhttp://liftweb.net > > > Beginning Scalahttp://www.apress.com/book/view/1430219890 > > > Follow me:http://twitter.com/dpp > > > Git some:http://github.com/dpp > > -- > Lift, the simply functional web frameworkhttp://liftweb.net > Beginning Scalahttp://www.apress.com/book/view/1430219890 > Follow me:http://twitter.com/dpp > Git some:http://github.com/dpp --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to liftweb@googlegroups.com To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/liftweb?hl=en -~----------~----~----~----~------~----~------~--~---