Hi there,
here is my scenario (a sort of a graph):
interface INode
{
IEnumerable<INode> Children { get; }
}
class Leave : INode {
Guid Id { ... }
IEnumerable<INode> Children { get; } //always empty
}
class Node : INode {
Guid Id { ... }
IEnumerable<INode> Children { get; } //can contain Leave and Node
}
I mapped this stuff using an any-type mapping in a many-to-many relation
<class name="Node" ...>
...
<bag name="Children" table="Node_Children">
<key column="NodeId"/>
<many-to-any id-type="Guid" meta-type="System.String">
<meta-value value="NODE" class="Node"/>
<meta-value value="LEAVE" class="Leave"/>
<column name="ItemType" not-null="true"/>
<column name="ItemId" not-null="true"/>
</many-to-any>
</bag>
</class>
but I have a problem: let's suppose I delete a Leave/Node: how can I
propagate this deletion to all the involved Node_Children rows?
Is it possible? Or shall I use a workaround? (i.e. a trigger on
deletion... but I'd really prefer to avoid :-)).
Thanks in advance,
Giulio
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