by using a different key-column?
<class name="Parent">
<set name="Children1" inverse="true" cascade="all-delete-orphan">
<key column="parent_id_1"/>
<one-to-many class="Child"/>
</set>
<set name="Children2" inverse="true" cascade="all-delete-orphan">
<key column="parent_id_2"/>
<one-to-many class="Child"/>
</set>
</class>
<class name="Child">
<many-to-one name="Parent1" column="parent_id_1" not-null="true"/>
<many-to-one name="Parent2" column="parent_id_2" not-null="true"/>
</class>
Show a real world domain, where you need this.
2010/9/9 v64 <[email protected]>
> Hi,
>
> My parent class has two collection properties that hold entities of
> the same type. I'm trying to understand the correct way to map this.
> Using the example from the docs:
>
> <class name="Parent">
> <set name="Children1" inverse="true" cascade="all-delete-orphan">
> <key column="parent_id"/>
> <one-to-many class="Child"/>
> </set>
> <set name="Children2" inverse="true" cascade="all-delete-orphan">
> <key column="parent_id"/>
> <one-to-many class="Child"/>
> </set>
> </class>
>
> <class name="Child">
> <many-to-one name="Parent" column="parent_id" not-null="true"/>
> </class>
>
> This obviously will not work because there's no way to tell which
> parent collection a child belongs to. How do I map this?
>
> TIA
> v64
>
>
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