Hi guys. I've got a very simple mapping question. I've got a many-to-many mapping in which children can belong to multiple parents. I'd like the parents to have a Map of children, indexed by name, instead of a simple set. My current mapping is:



How can I turn this into a map whose key values are the fields' name properties? I'm using hibernate-2.1. Thanks for any tips.

You'll have to set it manually (in you addChild() method actually, and create a different column, just as non related indexes.

You're suggesting that I should add a string column to the mapping table, and manually set the value when I add a new Field to the Section? I don't like that solution very much - it duplicates data that's already in the Field table. I'd rather manually maintain a map in the Section object than do that. But I'd much rather be able to tell hibernate to maintain said map for me :).

It would seem this wouldn't be an uncommon use case, nor a particularly difficult mapping to support. Does anyone else have a need for such a thing?

Can't do that, because your app can always put a different index in the map it will set.