Hi,
There are 2 styles of relations that can be defined between Entity beans (how you do it is container specific).
The first is via Foreign Keys, i.e. The table for one bean has a column(s) that represent the primary key(s) of the related bean and its table.
The other is via a sperate Relation Table - one that has no coresponding entity bean. This relation table basically contains primary key information linking the two beans and is most commonly used for bi-directional many to many relationships. The XDoclet ejb cmr example illustrates all this very nicely.
They are catered for in XDoclet 1.1 for Websphere, and now for JBoss 3 in XDoclet 1.2 (the CVS head version).
Regards,
Sean
| Aslak Hellesoy <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED] 28/07/2002 04:33
|
To: <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]> cc: Subject: RE: [Middlegen-user] Relation Table Relations |
Hi Sean.
I don't understand your question. Can you be more technical?
Aslak
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED]
Sent: 27. juli 2002 23:06
To: [EMAIL PROTECTED]
Subject: [Middlegen-user] Relation Table Relations
Hi,
Can MiddleGen create Relation Table style relations for the entties? (and if so how?)
(I'm using JBoss by the way)
Thanks,
Sean
