First of all, disclaimer: I am just trying SEAM, and therefore my model is just a stupid example. The idea is to define some hibernate mappings, and the try RichFaces and SEAM itself. Then don't panic because I am selecting things using radio buttons which have no sense in real life (for instance selecting a pet's owner using a radio) :)

I have the following model:

1) Customer which is a child class of Person (by inheritance)

2) Pet which is related to Person. Every Pet has a Person (owner), mapped as a ManyToOne relationship) like this:

private Person owner;

@ManyToOne(fetch = FetchType.EAGER)
public Person getOwner() {
                return owner;
}

Then, in Pet.xhtml which is the form I use to load new Pets I have

<h:selectOneRadio value="#{petHome.instance.owner}"  required="false" >
                                                <s:selectItems value="#{personList.allPerson}" var="person" label="#{person.name}"  />
                                                <s:convertEntity />
</h:selectOneRadio>

Then personList.allPerson has this code:

public List<Person> getAllPerson() {
                return super.getEntityManager().createQuery("select person from Person person").getResultList();
}

I loaded a person and a customer (which is a person also by inheritance). But then I try to go to Pet.xhtml (the page with the radio buttons) and kaboom, I get this exception:

java.lang.IllegalArgumentException: Cannot convert Person Person_1 of type class uy.edu.uas.jgenui.testapp.entity.Person to class uy.edu.uas.jgenui.testapp.entity.Customer
        at org.jboss.el.lang.ELSupport.coerceToType(ELSupport.java:358)
        at org.jboss.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:46)
        at org.jboss.seam.el.SeamExpressionFactory.coerceToType(SeamExpressionFactory.java:70)
        at com.sun.faces.renderkit.html_basic.RadioRenderer.renderOption(RadioRenderer.java:87)
        at com.sun.faces.renderkit.html_basic.SelectManyCheckboxListRenderer.encodeEnd(SelectManyCheckboxListRenderer.java:146)
        at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:836)
        at org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:190)

I don't get it, it tries to convert the defined person into a customer, and there are no references to customer into Pet.xhtml!

Then, if I change selectOneRadio to selectOneMenu (combo) it works perfectly right.

Any ideas please?

Thanks!