data validation

[jamesjmp]

hi,
in a form I want to validate that the code asigned in a field is one that already exists.
For instance, I´ve a field for currencies. I have a table for them, and I want to check that the currency filled is already on the database to avoid foreign keys problems.
I´ve found 2 solutions. The first is to override persist method and there by means of a query to check if that value is ok.
The second is to add a try-catch in the persist, and in the catch check if there has been an Exception like this

org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing:...

Is there a better "seam-way" of validating this?
thanks in advance!

[arussel]

what about a jsf validator ?
alex

[jamesjmp]

ok, I´m trying it with JSF validators.
I´ve found a problem with them, ValidatorException expects a javax.faces.application.FacesMessage, and I´m using org.jboss.seam.core.FacesMessages to access to my message_en.properties.
is there a good way to tackle this?
thanks!

[arussel]

give it what it wants :-)
http://www.redhat.com/docs/manuals/jboss/jboss-eap-4.2/doc/seam/api/org/jboss/seam/core/FacesMessages.html.

createFacesMessage function looks about right
alex