Re: [smartweb-devel] Smartweb Auth and problem with XDoclet/ Hibernate union subclass

[Roberto Lo G. <rlo...@sm...>]

>From the Hibernate official documentation, chapter 9 "Inheritance Mapping":

"Three tables are involved for the subclasses. Each table defines
columns for all properties of the class, including inherited
properties.

The limitation of this approach is that if a property is mapped on the
superclass, the column name must be the same on all subclass tables.
(We might relax this in a future release of Hibernate.) The identity
generator strategy is not allowed in union subclass inheritance,
indeed the primary key seed has to be shared accross all unioned
subclasses of a hierarchy."

As stated in the documentation there's a problem on the id generator,
plus we got into a "problem" on the database too:



2007/11/7, Gaetano Perrone <gpe...@sm...>:
>
> Ops i would say the hibernate problem (and not property) sorry....
> :-P
>
>
> Gaetano Perrone wrote:
> >
> > In my opinion the union-subclass actual solution is very fine because it
> > makes the generated database more simple and more "developer-friendly".
> > Then I think it deserves at least an attempt to preserve it.
> > Could we think to identify accurately the hibernate property and try to
> > resolve it??
> >
> >
> > svetrini wrote:
> >>
> >> At this time smartweb auth  has a little problem... Actually union
> >> subclass has.
> >> hbm generation fails due to a bug on xdoclet union subclass.
> >> We have just sended patches to xdoclet team but none new version was
> >> released.
> >> I recently found another minor problem on auth module. It doesn't create
> >> schema on dbs different from PostgreSQL ( I tried on MySQL and HSQL )
> >> this is not our bug but a knowed hibernate  problem.
> >>
> >> So...
> >>
> >> What do you think about change from union subclass to another subclass
> >> type?
> >>
> >> I'm waiting to your answers... :-)
> >>
> >
> >
>
> --
> View this message in context: http://www.nabble.com/Smartweb-Auth-and--problem-with-XDoclet--Hibernate-union-subclass-tf4761003s17546.html#a13624540
> Sent from the SmartWeb Developers mailing list archive at Nabble.com.
>
>
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