I see primaryKeyField in the docs, maybe try .record(obj.primaryKeyField.is) ?
-Ross
On Jan 19, 2010, at 3:31 PM, Franz Bettag wrote:
> trait Stamped[A <: LongKeyedMapper[A]]
> extends SkipLogging with KeyedMetaMapper[Long, A] {
>
> self: A with MetaMapper[A] with KeyedMapper[Long, A] =>
>
> override def afterCreate = (crudLog(_: A, "create")) ::
> super.afterCreate
>
> override def afterUpdate = (crudLog(_: A, "update")) ::
> super.afterUpdate
>
> override def afterDelete = (crudLog(_: A, "delete")) ::
> super.afterDelete
>
> private def crudLog(obj: A, action: String): Unit = {
> if (!self.skipLogging) {
> val log = new ActionLog
> log.action(action).klass(obj.getClass.getName).record
> (obj.primaryKey).save
> // Stamped.scala:54: error: value primaryKey is not a member of A
> }
> }
>
> }
>
>
>
>
> On 19 Jan., 21:22, David Pollak <[email protected]> wrote:
>> You don't need to use structural typing.
>>
>> Any KeyedMapper has a primaryKey method that returns a Mapped field of the
>> type of the key. To get the primary key field of a given KeyedMapper
>> instance, just call primaryKey.
>>
>>
>>
>> On Tue, Jan 19, 2010 at 11:55 AM, Ross Mellgren <[email protected]> wrote:
>>> How about structural typing?
>>
>>> trait Stamped[A <: LongKeyedMapper[A] with { val id: MappedLongIndex[A] }]
>>> ...
>>
>>> I haven't tried it, but maybe it will work.
>>
>>> -Ross
>>
>>> On Jan 19, 2010, at 2:47 PM, Franz Bettag wrote:
>>
>>>> On 19 Jan., 19:32, David Pollak <[email protected]> wrote:
>>>>>> i am trying to extend my logging trait. The Problem is, i can't say
>>>>>> something like A <: LongKeyedMapper[A] in my trait since ProtoUser
>>>>>> doesn't use IdPK but uses it's own declarations (which look the same
>>>>>> to me).
>>
>>>>> Why do you need ProtoUser extended with IdPK? Why can't your trait work
>>>>> with LongKeyedMapper?
>>
>>>> The code relies on having a .id method on the passed object. The Three
>>>> Traits are below. It works fine with anything having IdPK. At the
>>>> moment i have this code copied into my User singleton which is exactly
>>>> what i want to avoid.
>>
>>>> I don't know how i would dynamify the use of the .id method. In
>>>> ActionLog and the Stamped trait.
>>
>>>> trait Stamped[A <: LongKeyedMapper[A] with IdPK]
>>>> extends SkipLogging with KeyedMetaMapper[Long, A] {
>>
>>>> self: A with MetaMapper[A] with KeyedMapper[Long, A] =>
>>
>>>> override def afterCreate = (crudLog(_: A, "create")) ::
>>>> super.afterCreate
>>
>>>> override def afterUpdate = (crudLog(_: A, "update")) ::
>>>> super.afterUpdate
>>
>>>> override def afterDelete = (crudLog(_: A, "delete")) ::
>>>> super.afterDelete
>>
>>>> private def crudLog(obj: A, action: String): Unit = {
>>>> if (!self.skipLogging) {
>>>> val log = new ActionLog
>>
>>> log.action(action).klass(obj.getClass.getName).record(obj.id).save
>>>> }
>>>> }
>>
>>>> }
>>
>>>> trait SkipLogging {
>>
>>>> var skipLogging = false
>>>> }
>>
>>>> trait ActionLogs[A <: Mapper[A] with IdPK] {
>>
>>>> this: A =>
>>
>>>> def logs: List[ActionLog] = ActionLog.findAll(
>>>> By(ActionLog.klass, this.getClass.getName),
>>>> By(ActionLog.record, this.id)
>>>> )
>>
>>>> }
>>
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>>
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>> Lift, the simply functional web frameworkhttp://liftweb.net
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