AFAIK you can't App Engine doesn't support unique unless it's a key.
On Sep 14, 2:42 am, Artem Kuroptev <[email protected]> wrote:
> I'have tried to make a field of a class "unique" using different
> combinations of JDO annotations. Never successfully.
> Here is one of my variations:
> ---------------
> @Uniques({...@unique(name="MYCONST_1", members={"userJID"})})
> @Unique(name="MYCONST_2", members={"userJID"})
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class User
> {
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> private Long id;
>
> @Persistent
> @Unique(name="MYUSERJID_IDX")
> private String userJID;
>
> [..]
> ---------------
>
> Is there any way to apply "unique" constrain to a field of a class
> using JDO annotations?
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