This was discussed last month (
http://groups.google.com/group/nhusers/browse_thread/thread/973df7dce9c5e0dc/97d49dac7dc21f85?lnk=gst&q=notes#97d49dac7dc21f85)
and it is certainly on topic :-)
In short: the model is simple. Several classes have a collection of notes
(or, more precisely, a List, because the order probably matters). You could
create an interface (IHaveNotes) to deal with this in your code and make it
easy to add/retrieve notes from any entity.
Then, you have at least two possible ways to map this:
- Note is a component type, there is one table per Notes collection
- Note is an entity, there is one table for the Notes and a many-to-many
table per each collection, mapped with cascade="all-delete-orphan"
Note that the data implementation should NOT change your model. It's always
an IList<Note>.
Diego
On Sun, Jul 11, 2010 at 08:01, moohzor <[email protected]> wrote:
> Hi,
>
> This isn't strictly nhibernate related, but I thought this would still
> be the right place to ask.
>
> I have a Note entity, related to almost all other entities (you can
> attach a note to pretty much anything else). All these entities have a
> property to hold a collection of notes (but notes don't have to have
> reference to the entity they're related to). I don't know how to best
> model this in the database and map in hbm. How would you do this?
>
> Thanks in advance.
>
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