[hibernate-issues] [Hibernate-JIRA] Updated: (ANN-472) @UniqueConstraint declaration is not friendly towards inheritance or reflection

[Diego Pires Plentz (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/ANN-472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Diego Pires Plentz updated ANN-472:
-----------------------------------

    Component/s: binder

> @UniqueConstraint declaration is not friendly towards inheritance or reflection
> -------------------------------------------------------------------------------
>
>                 Key: ANN-472
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-472
>             Project: Hibernate Annotations
>          Issue Type: Improvement
>          Components: binder
>    Affects Versions: 3.2.0.ga
>         Environment: Hibernate 3.2 GA
>            Reporter: Ted Bergeron
>
> The current way to define a composite unique constraint is limiting.
> @Table(name="tbl_sky",
>     uniqueConstraints = {@UniqueConstraint(columnNames={"month", "day"})}
> )
> Suppose I have an abstract base class called A that gives me Id and Name, subclassed by abstract class B that gives me Customer.  Then I have many concrete classes that subclass B.  For all of these, I'd want the combination of Name and Customer to be unique.  As I do not use @Table with abstract base classes, I currently have to repeat:  uniqueConstraints = {@UniqueConstraint(columnNames={"name", "customer_id"})}  on all concrete classes.  
> If we had an alternate way to define these constraints at the property level (as XDoclet did with hibernate 2), I could define this in the base classes and inherit the constraint declaration.
> The other need is that I would like to use reflection to scan the properties and apply proper validations in the view layer.  With @Column(unique = true) this is easy to do.  The view layer makes an AJAX call and all is well.  For a composite constraint, it does not work well currently.

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