Thank you Diego, I was afraid this will end up unanswered :) That was one way I considered doing it, but there's also Activities who are, relationship-wise, the same as notes. Both Notes and Activities will most probably hold a lot of data. I am afraid that, with so many relationships, performance might become an issue pretty soon. Would it be possible to use a denormalized database; Note would hold type and id of the entity it is attached to?
On Sun, Jul 11, 2010 at 11:43 PM, Diego Mijelshon <[email protected]>wrote: > 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. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "nhusers" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<nhusers%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/nhusers?hl=en. >> >> > -- > You received this message because you are subscribed to the Google Groups > "nhusers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<nhusers%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > -- You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nhusers?hl=en.
