All the entities we are talking about are in the SAME entity group in order to create/update them in the same transaction. In addition to that, we declare an unowned relationship, using "Key" for example. I want to save all my entities in the same transaction.
On Sep 19, 5:52 pm, objectuser <[email protected]> wrote: > Because your relationships are unowned (so the objects are in > different entity groups, right?), you wouldn't be able to save them > all in the same transaction anyway. > > So you're right: you'll have to save them, which means multiple > transactions, and if one of them fails you'll have inconsistent data. > > On Sep 19, 8:47 am, mlenormand <[email protected]> wrote: > > > > > Hi Everybody, > > > Here's my problem with JDO and unowned relationships : > > > I have several entities of the same kind that are organized in a > > hierarchical way, maintained with unowned relationships. > > JDO can generate keys for my entities when they are written to the > > datastore, but with this option, I can't know my entity's keys until > > they are saved to the datastore. If I want to make a reference to an > > entity A from an entity B, it seems to be impossible because at this > > time I don't know A's key, that will be generated when transaction is > > committed. > > > One solution would be to use several transactions, each one would > > persist an entity, but it's not good because I want to persist all the > > entities in the same transaction. > > > I know that defining keys myself could solve the problem, but maybe > > there is an other solution that would be better ? > > > Thank you for your help. And thank you to the GAE team for the > > fantastic work you did ! --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
