How about:
trait AbstractPersistentChannel[T <: AbstractPersistentChannel[T]] extends
LongKeyedMetaMapper[T] { self: T =>}
trait AbstractPersistentMetaChannel[T <: AbstractPersistentChannel[T]]
extends
LongKeyedMetaMapper[T] { self: T =>}
class ChannelA extends AbstractPersistentChannel[ChannelA]
class ChannelB extends AbstractPersistentChannel[ChannelB]
// And there are some objects which use that trait:
object ChannelA extends ChannelA with
AbstractPersistentMetaChannel[ChannelA]
object ChannelB extends ChannelB with
AbstractPersistentMetaChannel[ChannelB]
type SomeMetaT = T forSome {type T <: AbstractPersistentMetaChannel[T]}
// I now have a list of those and have a can to store an element of that
list::
var cType: Can[AbstractPersistentMetaChannel[SomeMetaT]] = Empty
def showForm: JsCmd = {
val form = cType.map(_.create.toForm(Empty, c => c.save())) openOr
Nil
JsCmds.Noop
}
On Wed, Dec 10, 2008 at 11:41 AM, Joachim A.
<[EMAIL PROTECTED]>wrote:
>
> Hi,
> I hope this is not off-topic here.
> I have the problem that I can't find a type declaration for a collection of
> MetaMappers so that create.save works on the meta mapper.
>
> I have a base class for a certain kind of mappers and the same for the meta
> class (I don't show the MetaMappers which are used here):
>
> trait AbstractPersistentMetaChannel[T <: AbstractPersistentChannel[T]]
> extends
> LongKeyedMetaMapper[T] { self: T =>}
>
> And there are some objects which use that trait:
> object ChannelA extends ChannelA with
> AbstractPersistentMetaChannel[ChannelA]
> object ChannelB extends ChannelB with
> AbstractPersistentMetaChannel[ChannelB]
>
> I now have a list of those and have a can to store an element of that
> list::
> var cType: Can[AbstractPersistentMetaChannel[_ <:
> AbstractPersistentChannel[_]]] = Empty
>
> def showForm: JsCmd = {
> val form = cType.map(_.create.toForm(Empty, c => c.save)) openOr
> NodeSeq.Empty
> //...
> }
>
> The compiler complains:
> [WARNING] Channels.scala:74: error: value save is not a member of _$2
> [WARNING] val form = cType.map(t => t.create.toForm(Empty, c =>
> {c.save;ChannelList.startChannel(c)})) openOr NodeSeq.Empty
>
>
> Is there any way to define the type of cType so that save works?
>
> Hopefully I was able to explain the problem :) Any helps is appreciated,
> Joachim
>
>
> >
>
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