I have the following scenario of an unowned relationship between a
User and UserRoles
public class User extends DomainObject<Long, User> {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Extension(vendorName = "datanucleus", key = "gae.encoded-pk", value
= "true")
private String encodedKey;
@Extension(vendorName = "datanucleus", key = "gae.pk-id", value =
"true")
private Long userId;
private String username;
private String password;
private Long salt;
....
....
// @Basic(fetch = FetchType.EAGER)
private Set<Key> userRoleKeys = new HashSet<Key>();
@Transient
private Set<UserRole> userRoles = new HashSet<UserRole>();
As you would notice, I am using JPA, The UserRoles collection is
marked transient and I am adding the keys for the UserRoles in the
userRoleKeys Set.
So far so good.
Now, when I retrieve the user and try to access the userRoles, i get
the above mentioned error.
The error gets resolved when I use the @Basic annotation with the
userRoleKeys (see the commented line), however, that conflicts with
another functionality. If I want to add roles to the user and then
merge it then that does not work. It continues to retain the earlier
set if I have the @Basic annotation applied.
Questions
----------------
1) How do I detach the userRoleKeys set from the user object. I
already have the following in my persistence.xml
<property name="datanucleus.DetachAllOnCommit"
value="true" />
<property name="datanucleus.DetachOnClose" value="true"
/>
2) Why doesn't the merge update the set when I add the @Basic
annotation?
3) Is there a standard way of resolving the above situation?
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