Hey Piotr,
I also met this problem. Did you find out any solution? Thanks !
在 2009年2月23日星期一UTC+8下午3时22分07秒，Piotr Jakóbczyk写道：
>
> I would like to point that above mapping pattern works, but only when
> the second mapping (of class BusinessObject) was added to NH
> configuration BEFORE the first one mapping (of ConcreteObject1 and
> ConcreteObject2).
>
> On 20 Lut, 17:13, Piotr Jakóbczyk <[email protected]> wrote:
> > I can't send actual classes and tables, but let's try simple example:
> >
> > abstract class BusinessObject
> > {
> >
> > }
> >
> > class ConcreteObject1 : BusinessObject
> > {
> >
> > }
> >
> > class ConcreteObject2 : BusinessObject
> > {
> >
> > }
> >
> > Additionaly thera are many ohter classes inherited from
> > ConcreteObject1 as well as ConcretObject2. Except of base class -
> > BusinessObject - both of concrete class have different specific
> > characters.
> > For some reason objects of both concrete classes MUST be stored in
> > distinct tables: TABLE1, TABLE2.
> >
> > Sa we have following mappings:
> >
> > <class name="ConcreteObject1" table="TABLE1" polymorphism="explicite"
> >
> > <subclass>
> > </subclass>
> > <subclass>
> > </subclass>
> > </class>
> >
> > <class name="ConcreteObject2" table="TABLE2" polymorphism="explicite"
> >
> > <subclass>
> > </subclass>
> > <subclass>
> > </subclass>
> > </class>
> >
> > Mapping strategy of subclasses is not importat at this moment.
> > Important fact is that mapping strategy for subclasses of
> > ConcreteObject1 can be different from mappng strategy for subclasses
> > of ConcreteObject2.
> >
> > But in some cases we need to query about list of BusinessObject's
> > (ConcreteObject1 and ConcreteObject2 together) base properties. So we
> > introduced some special marker classes:
> >
> > class ConcreteObject1Marker : BusinessObject
> > {
> >
> > }
> >
> > class ConcreteObject2Marker : BusinessObject
> > {
> >
> > }
> >
> > There are no classes inherited from ConcreteObject1Marker or
> > ConcreteObject2Marker.
> >
> > And we want to prepare following mapping of BusinessObject class:
> >
> > <class name="BusinessObject" abstract="true" mutable="false"
> > polymorphism="explicite" >
> > <union-subclass name="ConcreteObject1Marker" table="TABLE1">
> > </union-subclass>
> > <union-subclass name="ConcreteObject2Marker" table="TABLE2">
> > </union-subclass>
> > </class>
> >
> > And now we should can quering about BusinessObject's instances
> > although they are stored in distinct tables (TABLE1 and TABLE2).
> >
> > --
> > Piotr Jakóbczyk
>
> --
> Piotr Jakóbczyk
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