Hello,

I'm using xdoclet to generate my hibernate mapping files but I have a problem when I'm trying to generate a many to many relationship. I have two tables which have a many to many relationship. They are linked to eachother with a third table which also contains some extra properties except the keys of the others. I have three separate classes and I'm using a many-to-one relationship in the linking table to the other two and from the two I'm using a one-to-many relationship. When I try to generate the mapping files I get an exception which says that my linking table is missing an id.

What I understand is that I haven't got it right in the xdoclet tags but I don't know how to fix it. Does anyone have any suggestions or does this question belong in the xdoclet forum?

Thanks in advance.

/K

Hi!

From what I understand of your post you want to link class A and B in a many-to-many-relationship via a class C that could be considered an entity?

Then the C-class can have an id property (it stand as optional in the Hib Docs), preferably of a Serializable and nullable type, for example java.lang.Long. I recommend you use it, it has some advantages. (see p. 20-21 in the docs)

Then you map this via XDoclet with something like this



I've also had this urge for an ID from XDoclet numerous times, so I'm a bit confused about the 'optional'-part of the ID.... but.... all you have to do is comply ;-)

Sincerely,

/F