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ManyToMany: Why is no exception thrown? [message #379033] Mon, 11 August 2008 05:57 Go to previous message
Christian Reiter is currently offline Christian Reiter
Messages: 4
Registered: July 2009
Junior Member
Hi!

I've defined two Entity Objects named Person and City. They have a
ManyToMany JPA relationship.

The relationship is established through a relation table in the DB named
CITY_PERSON.

My Problem is that when i try to remove a City which is "in
use"/referenced by some Person i do not get an exception, instead the City
as well as the row in CITY_PERSON gets deleted without a warning.

When i try to remove a Person i do get a RollbackException as expected and
the Person is not removed.

Why do i not get an exception when removing a used/referenced City?

Is there any way to check if any entity has references prior to removing
it.

Best regards,
christian

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