This issue is fully described in forum id 29290, where no resolution was ever posted.

Java Enum type 'ordinal' and 'name' properties are not stored. When viewing through Object Manager (6.1), these properties are displayed as null. I am not sure if the underlying Enum functionality is working correctly despite this (have not tested), but as a minimum it is confusing since there's no way to tell the identity of an Enum property in the GUI.

E.g.

public enum Values {
  ONE,
  TWO;
}

In object manager, I would expect to see Values.ONE and Values.TWO or at least ONE and TWO when I browse the objects.

I've tested the equivalent using typesafe enum,

public class Values {
  public static final Values ONE = new Values("ONE");
  public static final Values TWO = new Values("TWO");
  private final String id;
  private Values(String id) {
    this.id = id;
  }
}

and in this case the id is stored as expected.

Tested with db4o 6.3.201.

Thanks
Lance Buchan
Tel +27 76 8513 929