(N)Hibernate: deleting orphaned ternary association rows when either associated row is deleted.

Posted by anthony on Stack Overflow See other posts from Stack Overflow or by anthony
Published on 2010-05-06T01:55:01Z Indexed on 2010/05/06 1:58 UTC
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sql

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nhibernate

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nhibernate-mapping

I have a ternary association table created using the following mapping:

<map name="Associations" table="FooToBar">
    <key column="Foo_id"/>
    <index-many-to-many class="Bar" column="Bar_id"/>
    <element column="AssociationValue" />
</map>

I have 3 tables, Foo, Bar, and FooToBar.

When I delete a row from the Foo table, the associated row (or rows) in FooToBar is automatically deleted. This is good.

When I delete a row from the Bar table, the associated row (or rows) in FooToBar remain, with a stale reference to a Bar id that no longer exists. This is bad.

How can I modify my hbm.xml to remove stale FooToBar rows when deleting from the Bar table?

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