Is this new to nhibernate 2.0 ? I can't find anything about that in my
nhibernate 1.2 book ....

There is a reference to <joined-subclass> but that implies using the
Table-per-subclass strategy, which I don't want to do.

Do you have an example on how to use extends and <join>

Thanks

On 19 mar, 15:34, Fabio Maulo <[email protected]> wrote:
> you should use extends and <join>
>
> 2009/3/19 graphicsxp <[email protected]>
>
>
>
>
>
> > Hello,
>
> > I have an exception Duplicate class/entity mapping Comp.PostBase.
>
> > This is because I have two mapping files for two different tables but
> > they both map to two classes that share the same base class :
>
> > <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
> >  <class name="Comp.PostBase, Comp" table="Comment" lazy="true"
> > discriminator-value="POST_BASE" abstract="true">
> >    <id name="Id" column="PostID">
> >      <generator class="native"/>
> >    </id>
>
> >    <discriminator column="Type" type="string" />
>
> >    <property name="DateCreated" type="date" column="DateCreated" />
>
> >    <subclass name="Comp.CommentPost, Comp" discriminator-
> > value="COMMENT">
> >      <property name="ParentId" type="Comp.CommentPost, Comp"
> > column="ParentId" />
> >      <many-to-one name="thePost" cascade="none" column="PostID" not-
> > null="true" />
> >    </subclass>
>
> >  </class>
> > </hibernate-mapping>
>
> > AND
>
> > <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
> >  <class name="Comp.PostBase, Comp" table="Post" lazy="true"
> > discriminator-value="POST_BASE" abstract="true">
> >    <id name="Id" column="PostID">
> >      <generator class="native"/>
> >    </id>
>
> >    <discriminator column="Type" type="string" />
>
> >    <property name="DateCreated" type="date" column="DateCreated" />
>
> >    <!-- Description of a Post entity -->
> >    <subclass name="Comp.Post, Comp" discriminator-value="POST">
> >      <property name="Headline" type="string" length="500"
> > column="Headline" />
> >      <property name="URL" type="string" length="1000" column="URL" />
> >      <property name="AnalystComment" type="string"
> > column="AnalystComment" />
> >      <bag  name="Comments" inverse="true" cascade="all" lazy="true">
> >        <key column="CommentID" />
> >        <one-to-many class="Comp.CommentPost, Comp" />
> >      </bag>
> >    </subclass>
>
> >  </class>
> > </hibernate-mapping>
>
> > That seems to be a big issue for me. How can I do that ?
>
> --
> Fabio Maulo
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