jboss-4.0.4.GA_1 is used
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Try something like this:
| @ManyToMany( targetEntity = Usergroup.class,
cascade={CascadeType.MERGE, CascadeType.REFRESH})
|
Best regards
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Have you checked whether the correct foreign keys are in place in the database?
If not, have you tried to drop the tables and allow Hibernate (which I assume
you're using) to generate the tables again?
On a side note, a few non related tips for you:
1. You don't need an explicit constructor if
Thanks a lot for the help.
In the DB there are no foreign keys.
Inspecting the Database, I saw, that the tabletype is MyISAM whitch I think
doenot support foreign keys.
How can I tell Hibernate to create the tables with type innodb?
I tried dropping the tables. The uniqueconstraint, which wasn´t
You can instruct MySQL to create InnoDB tables by default.
Just put
| default-table-type=innodb
|
under [mysqld], and you're set.
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thanks a lot,
that works fine now, and with innodb tables the referential integritay is not
violated.
But I´, not sure, how to act here correctly.
I catch two (identical?) runtimeexceptions - why two?
java.lang.RuntimeException: org.jboss.tm.JBossRollbackException: Unable to
commit, tx=Transact
I try to detect the constraintviolation now via
catch (RuntimeException e)
| { if
(e.getCause().getCause().getCause().getClass().toString().equals("class
org.hibernate.exception.ConstraintViolationException") )
| { DO SOMETHING
is that OK?
But there are two things I don´t understand.
1)
for point 1, the double Exception, I detected, that only one exception was
thrown.
the loggger.error produces double output,
logger.debug doesnot.
But I still don´t know, why this happens and wyh I can´t catch the exception
when calling em.remove
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