I have a user with id 1 and name "A" and a group with id 24 and name "B".
They're in a relationship with an entry in the Join-table.
Then i update "A" by doing
| User u = new User();
| u.setId(1);
| u.setName("Z");
| manager.merge(u);
|
and after that the entry in the join-table is gone. I can change the group like
this without destroying the relationship, though.
fundamental mistake on my side? :)
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