I think I may have found the answer. Even though an encoded key is a string,
I should use KeyFactory.stringToKey(encodedKeyString) to compare two key
strings.
On Tue, Sep 1, 2009 at 7:18 PM, Cornel <corneliu.lupu...@gmail.com> wrote:
> Hello!
>
> I ran over this problem. I was retrieving a "DbContact" data set
> simply ordered by
> encodedKey ascending, and i got this list:
>
> [(key agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYm0gMCxIJRGJDb250YWN0GJxIDA
> name EUROTRIM)
> , (key agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYnUgMCxIJRGJDb250YWN0GJ5IDA
> name ANCA ELECTRIC SYSTEMS)
> , (key agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYn0gMCxIJRGJDb250YWN0GKBIDA
> name TWIN TRADING)
> ...............
>
> So, apparently
> "agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYnUgMCxIJRGJDb250YWN0GJ5IDA" <
> "agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYn0gMCxIJRGJDb250YWN0GKBIDA" (the
> second and the third entries in the above list)
>
> But
> "agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYnUgMCxIJRGJDb250YWN0GJ5IDA".compareTo
> ("agljb3NpbnV4NjhyIQsSCkRiQ3VzdG9tZXIYn0gMCxIJRGJDb250YWN0GKBIDA") =
> 37 > 0, which is opposite!
>
> The encodedKey field is defined in the DbContact class as:
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class DbContact extends DbEntity {
>
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> @Extension(vendorName="datanucleus", key="gae.encoded-pk",
> value="true")
> private String encodedKey;
>
> @Persistent
> private DbCustomer customer;
> .......
>
> Also, i have a DbCustomer class which is the parent of a DbContact
> class, defined as:
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class DbCustomer extends DbEntity {
>
> @PrimaryKey
> @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
> @Extension(vendorName="datanucleus", key="gae.encoded-
> pk",value="true")
> private String encodedKey;
>
> @Persistent(mappedBy = "customer")
> @Order(extensions = @Extension(vendorName="datanucleus",
> key="list-ordering", value="customerProfile desc"))
> private List<DbContact> contacts;
> ..........
>
> So what's with this inconsistence? Have any ideas?
--
Corneliu Paul Lupulet
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