Hello,
I've more ore less the same problem.
The solution should be something like:
<!--SUPERCLASS -->
<class-descriptor class="com.jma.interescola.core.User" table="user_1">
<extent-class class-ref="com.jma.interescola.core.Student" />
<field-descriptor id="1" name="_id" column="id" jdbc-type="INTEGER"
primarykey="true" autoincrement="true"/>
<field-descriptor id="2" name="_name" column="name" jdbc-type="VARCHAR"/>
</class-descriptor>
<!--SUBLASS -->
<class-descriptor class="com.jma.interescola.core.Student" table="student">
<field-descriptor id="1" name="_id" column="id" jdbc-type="INTEGER"
primarykey="true" autoincrement="true"/>
<field-descriptor id="2" name="student_id" column="student_id"
jdbc-type="INTEGER" primarykey="true" autoincrement="true"/>
</class-descriptor>
or I need "super" reference?
Thanks
> Hi,
>
> I had a similar problem. You may want to have a look at the "Problem mapping
> inheritance hierarchy using joined tables for subclasses" thread on this
> list (last post 2003-12-05) or at the "Extents and the various inheritance
> hierarchy mappings" thread at the dev-list. I do not think, this is fixed in
> rc5. If you want to materialize the sub-class, it needs to be declared as
> extent of the superclass. Yet, it is not possible to use extent defintions
> for joined subclasses if primary keys serve as foreign key in the subclass.
> It may work if you have an additional foreign-key column in your subclass
> (making the primary keys unique).
>
> Peter
>
> > Hi,
> > I'm trying to map inheritance to multiple joined tables, but something is
> > going wrong.
> > It inserts ok, but when loading, it materializes the superclass, instead
> > of subclass.
> > Important:
> > 1) I am NOT using extents;
> > 2) I am not declaring attributes (_id, in this case, which is is primary
> > key and serves also as foreign key) in the subclass in the object model.
> > 3) I have tried the anonymous field approach, but it materializes the
> > superclass too.
>
> > I believe I am facing a configuration mistake, so these are the
> > class-descriptors:
>
> > <!--SUPERCLASS -->
> > <class-descriptor class="com.jma.interescola.core.User" table="user_1">
>
> > <field-descriptor id="1" name="_id" column="id" jdbc-type="INTEGER"
> > primarykey="true" autoincrement="true"/>
> > <field-descriptor id="2" name="_name" column="name" jdbc-type="VARCHAR"/>
>
> > </class-descriptor>
>
> > <!--SUBLASS -->
> > <class-descriptor class="com.jma.interescola.core.Student"
> > table="student">
> > <field-descriptor id="1" name="_id" column="id" jdbc-type="INTEGER"
> > primarykey="true" autoincrement="true"/>
>
> > <reference-descriptor auto-retrieve="true" auto-update="true"
> > auto-delete="true" name="super"
> > class-ref="com.jma.interescola.core.User">
> > <foreignkey field-ref="_id"/>
> > </reference-descriptor>
> > </class-descriptor>
>
> > Please, any help or suggestion would be great.
> > If this is a bug, anyone knows if the release rc5 fixed it?
> > Thank you.
>
>
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