[jboss-user] [JBoss Seam] - best practice question: SMPC, @OneToOne and <h:selectOneMenu

I am encountering PersistenceException in designing a web form that results from using Seam-managed persistence context(SMPC) + @OneToOne and <h:selectOneMenu>. I am trying to use the entity as a pure JSF backing bean. The problem is modifying the department's ID, which is still managed by SMPC. Does anyone know a clever design/solution to use @OneToOne + <h:selectOneMenu> ? The examples in Seam1.1GA do not appear to have this use case covered. The relevant codes are posted below. Thanks. | Caused by: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=null:1166713106023/32, BranchQual=null:1166713106023, localId=0:32], status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.PersistenceException: org.hibernate.HibernateException: identifier of an instance of Department was altered from 1 to 2) | Employee.java -- | @Name("employee") | @Entity | public class Employee { | | @Id | @GeneratedValue | private Long id; | | @OneToOne | @JoinColumn(name = "departmentId") | private Department department; | | // getters and setters | } Department.java -- @Name("department") | @Entity | public class Department { | | @Id | @GeneratedValue | private Long id; | | private String name; | | // getters and setters | } UserView.java -- @Name("userView") | public class UserView { | @In | private EntityManager em; | | @Factory("departmentList") | public List<SelectItem> initDepartmentList() { | // use em; to return an instance of List<SelectItem> | } | } | user.xhtml -- anonymous wrote : | <h:selectOneMenu id="user.department" value="#{employee.department.id}"> | <f:convertNumber/> | <f:selectItems value="#{departmentList}"/> | </h:selectOneMenu> | <h:commandButton value="Update" action="update"/> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995922#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...