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https://issues.jboss.org/browse/SEAMPERSIST-67?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12649034#comment-12649034
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Jason Porter commented on SEAMPERSIST-67:
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Hantsy, what you have in the example is a bi-directional Many to Many. The only
way to correctly save a bi-directional Many to Many. In that case you *must*
set both sides of the relationship to maintain consistency and avoid
corruption. If this were changed to a unidirectional Many to Many it would work
the way you are expecting. This is all plain JPA, Seam isn't changing any of
these
Here are a couple of links to help
*
http://docs.jboss.org/hibernate/core/3.6/reference/en-US/html/tutorial.html#tutorial-associations-usingbidir
* http://en.wikibooks.org/wiki/Java_Persistence/ManyToMany
> LazyInitializationException threw when persist a Many to Many collection of
> an entity.
> --------------------------------------------------------------------------------------
>
> Key: SEAMPERSIST-67
> URL: https://issues.jboss.org/browse/SEAMPERSIST-67
> Project: Seam Persistence
> Issue Type: Bug
> Environment: Java 6 update 27, Seam 3.1.0Beta2, JBoss 7.0.1.Final
> Reporter: hantsy bai
> Priority: Critical
>
> I tried a saved a many to many relation(multicheckbox), but failed.
> But in before seam 2 application, I used like this, never encounter such a
> problem.
> I used Seam managed Persistence, and added TransactionIntercepter in the
> beans.xml.
> Please refer the discussion in the forum.
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