[hibernate-issues] [Hibernate-JIRA] Commented: (HV-535) Validator sees all nulls on proxy object when proxied entity class has constraint annotations applied to fields instead of methods

[Jesse Hutton (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HV-535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44536#comment-44536 ] 

Jesse Hutton commented on HV-535:
---------------------------------

I spoke with sebersole on #hibernate, and he claimed that hibernate cannot do anything about this and that it must be done in HibernateValidator. Here is the problem:

Child child = em.find(Child.class, id);
Parent parent = child.getParent();
validator.validate(parent); <-- constraint violations!

This fails when:
A) parent is a proxy because it was specified as FetchType.LAZY in the JPA configuration
B) Parent uses field level BV annotations

In order to hit the bug, both A and B have to be true. A is done by Hibernate, and B is done by HibernateValidator.

I've simply moved all my BV annotations to methods. However, I think that this should be handled transparently for new users or at least clearly documented and warnings emitted somewhere when field level BV annotations are used in an entity class that Hibernate expects to create proxies of.

> Validator sees all nulls on proxy object when proxied entity class has constraint annotations applied to fields instead of methods
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HV-535
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HV-535
>             Project: Hibernate Validator
>          Issue Type: Bug
>    Affects Versions: 4.1.0.Final, 4.2.0.Final
>         Environment: RHEL 6.1
>            Reporter: Jesse Hutton
>
> When hibernate creates a proxy of an entity relation (eg. when FetchType.LAZY is specified on a @ManyToOne relationship) and the Bean Validation annotations have been applied on the proxied class to fields instead of methods, the validator can't see any values. All it sees are nulls.

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