package payment.model

import net.liftweb.mapper._
trait PaymentableMapper[OwnerType <: PaymentableMapper[OwnerType]]
        extends LongKeyedMapper[OwnerType] {
    self: OwnerType =>
    def paid: Unit
}

trait PaymentableMetaMapper[OwnerType <: PaymentableMapper[OwnerType]]
        extends LongKeyedMetaMapper[OwnerType] {
    self: OwnerType =>
}

abstract class MappedPaymentable[T <: Mapper[T], P <: PaymentableMetaMapper[_]](owner: T, paymentable: => P)
        extends MappedLongForeignKey(owner, paymentable)

//[info]   Source analysis: 1 new/modified, 0 indirectly invalidated, 0 removed.
//[info] Compiling main sources...
//[error] /.../PaymentableMapper.scala:15: no type parameters for constructor MappedLongForeignKey: (theOwner: T,_foreignMeta: => net.liftweb.mapper.KeyedMetaMapper[Long,O])net.liftweb.mapper.MappedLongForeignKey[T,O] exist so that it can be applied to arguments (T, P)
//[error]  --- because ---
//[error] argument expression's type is not compatible with formal parameter type;
//[error]  found   : P
//[error]  required: net.liftweb.mapper.KeyedMetaMapper[Long,?O]
//[error] abstract class MappedPaymentable[T <: Mapper[T], P <: PaymentableMetaMapper[_]](owner: T, paymentable: => P)
//[error]                                                                                ^
//[error] one error found