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Problem, add new records in a many-to-many relation

 
babak behzadi
Greenhorn
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Hi,
I have two entities 'Person' and 'Team' which are mapped by a bidirectional many-to-many relation using annotations, as follow:


,


my service class{1, 2: According to 'Christian Bauer and Gavin King, Java Persistence with Hibernate by Manning Publication Co. Page 301, P 2'}:





And my problem: Calling method 'addTeamToPerson()' does not cause to add a new record to join table 'person_team'!!!
Note: I traced the code line by line, there's no error or exception and the transaction commits.
Please help me solve it.

regards.
babak behzadi
 
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