[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-6783) Using FetchType.EAGER with @ElementCollection results in multiple entity copies returned via Criteria query
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http://opensource.atlassian.com/projects/hibernate/browse/HHH-6783?page=c...
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Greg Burcher commented on HHH-6783:
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The work-around seems simple enough, but the problem is that we would need to add this
call to setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY) to every use of
Criteria.list(). Otherwise, at any point in time, someone could change the mapping of an
@ElementCollection to EAGER and suddenly the Criteria.list() would be "broken",
returning multiple references to the same object.
This is a cumbersome convention to enforce in our entire codebase. We could handle by
wrapping the hibernate Session or Criteria in our own class and adding the call to
setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY) always in our wrapper, but this is a
significant design decision to correct what feels like an error in hibernate, even if you
guys say it is not a bug.
I'm guessing since you have already published a FAQ on this issue, you are not likely
to change this behavior?
Using FetchType.EAGER with @ElementCollection results in multiple
entity copies returned via Criteria query
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Key: HHH-6783
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6783
Project: Hibernate Core
Issue Type: Bug
Components: annotations
Affects Versions: 3.6.0
Environment: MySQL
Reporter: Greg Burcher
If we specify FetchType.EAGER on an @ElementCollection:
@ElementCollection(fetch = FetchType.EAGER)
@Column(name = "emailAddress")
private Set<String> emailAddresses;
then request all persisted objects of this class via Criteria:
session.createCriteria(ReportSchedule.class).list();
The returned list contains multiple references to each ReportSchedule, one per email
address.
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