i have three objects, the first user is parent of mobile_user, then StudentMobileUser and WorkerMobileUser inherit from mobile_user.


User
/ \
| <----------Table per subclass
MobileUser
/\ /\
| | <---------Discriminator
Studen.. Worker...


For the first level im using "Table per subclass" by using this code (Xdoclet) on MobileUser:
/**
* @hibernate.joined-subclass table="mobileuser"
* @hibernate.joined-subclass-key
* column="user_id"
*/

Then i wanted to add the next sub classes, but this time using Table per hierarchy so finally MobileUser is like this:
/**
* @hibernate.joined-subclass table="mobileuser"
* @hibernate.joined-subclass-key column="user_id"
* @hibernate.discriminator column="discriminator" <----"ADDED THIS"
*/
And for Student.. an Worker this are their mappings...
/**
* @hibernate.subclass discriminator-value="S"
*/

WELL, THE PROBLEM is that the first level is OK, i got the user table and mobile_user table, but i does not generates discriminators (on my db schema) for student and worker on mobile_user...

ANY HELP APRECCIATED

Hi,

we had the same problem.
We didnt use xdoclet though.
Creating the mapping manually worked,
but the generated sql was wrong.
For example it used three inserts instead of two.
The only way to get this to work was a custom
entity persister like in:



The default persister used by hibernate here
is JoinedSubclassEntityPersister. This can be a starting point
for you. However this was quite difficult for us.