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Adrian Smith's Blog

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Problem with Hibernate many-to-many association

Started by Adrian Smith · 8 months ago

This post is really a record for both myself and anyone else who ever comes across the same problem.
The Problem: Given two entities with a many-to-many association between them, the join table isn’t being populated when an association is made.
The Problem Set: Two persistent e ... Continue reading »

7 comments

Canda
2 years ago

Many many thanks for this... I was stuck on this for ages too!

Great job

reply

Sat Freak
2 years ago

Hi there,

same here, while in a different context:

Using JPA with Hibernate populating an many-to-many Realtionship, where all Entities on both ends are already persistent. The JoinTable was empty, although no exception was thrown.

Calling flush() befor calling a merge() did the job!

Many thanks for this blog!

reply

egÃ¥roht
2 years ago

Excellent. Just what I needed to know. Have been sitting some hours scratching my head sore. Thanks :-)

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shailesh
1 year ago

We are facing the similar situation. When we create the entity, many to many association gets created but when we just try to create the association between already exisitng objects, we get no error and no association gets created. We tried it with flush before and after but of no use.

-Shailesh

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paulrene
1 year ago

I've been stuck on this for 3 days now! Thank you so much for the solution! This should be mentioned in the Hibernate FAQ. I'll drop them a letter.. ;)

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Marko Novakovic
1 year ago

My GOD.... Thanks very much.. More than few days of reading official documentation and couldn't find a solution. Thanks again

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