#562 ✓wontfix
Leif Gensert

JPA's @ElementCollection and Fixtures don't seem to work

Reported by Leif Gensert | January 26th, 2011 @ 07:40 AM | in 1.3 (closed)

Helle everyone,
I wrote a project using the @ElementCollection (which provides an easy
way to persists Lists and Maps to a database).
I still want to use the Fixtures engine used in play. It's easy to
declare maps in yml format. This works as well. But when I have other
children using the @ManyTonOne annotation the problems start.
As long as only 1 parent entity is declared in the data.yml everything
is fine. As soon as a child to another parent entity is created a
HibernateException is thrown:
A java.lang.RuntimeException has been caught, Cannot load fixture
data.yml: org.hibernate.HibernateException: Found two representations
of same collection: models.CollectionHolder.genericParameters
To illustrate the problem, I provided a small sampleproject on github:

https://github.com/leifg/elementcollectionplaygroud

Just run the unit test and the error occurs. In the data.yml you'll
find a comment. If you delete all the lines underneath the comment,
the test runs fine.

This was all tested with the latest 1.2 version on MacOS X 10.6.6 and Windows XP

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