I have used the above mentioned solution for my many to many
relations. Now if I want to get all the entities of type Entity2 for
one entity of type Entity1 I query the ManyToManyLink with the key of
Entity1. As a result I get a list of keys for Entity2. Now how do I
query Entity2 to get all the
You might want to try one of the
javax.​jdo.​PersistenceManager.getObjectsById(...)
methods. I have not done this myself yet (although I do use
getObjectById(...)), so I have not used an array or collection of
OIDs. You might want to give this a try.
Failing that, you might want to have as an
Thanks a lot for your helpful code Ian! Now I've implemented the long
as gae.pk-id. Both entities and the link are stored but I don't know
how to adopt what you wrote:
On 7 Jun., 21:54, Ian Marshall ianmarshall...@gmail.com wrote:
Beware that in this case, the Long ID values are not the full
Thanks a lot for your helpful code Ian! Now I've implemented the long
as gae.pk-id. Both entities and the link are stored but I don't know
how to adopt what you wrote:
On 7 Jun., 21:54, Ian Marshall ianmarshall...@gmail.com wrote:
Beware that in this case, the Long ID values are not the full
Thanks a lot for your helpful code Ian! Now I've implemented the long
as gae.pk-id. Both entities and the link are stored but I don't know
how to adopt what you wrote:
On 7 Jun., 21:54, Ian Marshall ianmarshall...@gmail.com wrote:
Beware that in this case, the Long ID values are not the full
How do I build a key from parent and child if I don't know the parent's
key?
I use a field to link the entity group parent instance to a child
instance. I make this bi-directional, so from an entity I can retrieve
both its parent and also its child or set of children.
Thanks a lot for your
Thank you very much Ian! I've implemented your solution but now I
struggle with adding a Link to the database: A record of entity 1 and
one of entity 2 are stored in the database. How can I get them out of
the database to put their keys into a new link? I don't know the keys
of both entities
