Yet another newbie question...

[bkyrlach]

Okay, I think I'm starting to figure things out. However, now I'm having problems with a one to many relationship. Here are some source snippets...

(from User.java)

@NotNull @ManyToOne @JoinColumn(name="Id", nullable=false)
public Role getRole()
{
return role;
}

public void setRole(Role role)
{
this.role = role;
}

(from Role.java)

@Entity
@Name("role")
@Scope(EVENT)
@Table(name="roles")
public class Role implements Serializable
{
private String name;
private Integer id;

public Role(String name, Integer id)
{
this.name = name;
this.id = id;
}

public Role() {}

@Id @GeneratedValue
public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

@NotNull @Length(min=1, max=15)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

public String toString()
{
return "Role(" + name + ")";
}
}

(from YaRBImpl.java)

@Stateful
@Name("yarb")
@Scope(APPLICATION)
@Interceptors(SeamInterceptor.class)
public class YaRBImpl implements YaRB
{
List roles;
Map<String,Role> roleMap;

@PersistenceContext
EntityManager em;

@Create
public void loadData()
{
roles = em.createQuery("from Role r").getResultList();

Map<String,Role> results = new TreeMap<String,Role>();

for(Role role: roles)
{
results.put(role.getName(), role);
}
roleMap = results;
}

public Map<String,Role> getRoles()
{
return roleMap;
}

public Converter getConverter()
{
return new RoleConverter(roles);
}

public Role getNullRole()
{
return new Role();
}

static public class RoleConverter implements Converter, Serializable
{
List roles;

public RoleConverter(List roles)
{
this.roles = roles;
}

public String getAsString(FacesContext facesContext, UIComponent component, Object obj) throws ConverterException
{
if (obj == null) return null;

return String.valueOf(((Role) obj).getId());
}

public Object getAsObject(FacesContext facesContext, UIComponent component, String str) throws ConverterException
{
if(str == null || str.length()==0) return null;

Integer id = new Integer(str);
for (Role role: roles)
{
if(role.getId().equals(id))
{
return role;
}
}

return null;
}
}
}

(from SSBImpl.java)
@Stateless
@Name("ssb")
@Interceptors(SeamInterceptor.class)
public class SSBImpl implements SSB
{
@In(required=false) @Valid
private User user;

@In(required=false) @Valid
private Role role;

@PersistenceContext
private EntityManager em;

@IfInvalid(outcome="index")
public String invoke()
{
List existing = em.createQuery("select username from User where username=:username").setParameter("username", user.getUsername()).getResultList();
if(existing.size()==0)
{
em.persist(user);
return "go";
}
else
{
return "oops";
}
}

@IfInvalid(outcome="role")
public String createRole()
{
List existing = em.createQuery("select name from Role where name=:name").setParameter("name", role.getName()).getResultList();
if(existing.size()==0)
{
em.persist(role);
return "bob";
}
else
{
return "role";
}
}
}

(from index.xhtml)

<h:selectOneListbox value="#{user.role}" converter="#{yarb.converter}">
<f:selectItems value="#{yarb.roles}"/>
</h:selectOneListbox>
<h:messages/>
<h:commandButton type="submit" value="Submit" action="#{ssb.invoke}"/>
<h:commandButton type="submit" value="Search" action="#{userlist.listUsers}"/>
</h:form>

It lists my roles correctly, and I can see that my converter is actually returning a role object when I try and submit the form. However, it's just returning me to index.xhtml with a rather generic validation error. If I comment out the snippet from index.xhtml that I provided above, it works, but I don't get any role (obviously). What am I doing wrong?