Multiple contexts

[cflorion]

Does Ensemble work in a multiple ManagedObjectContexts app ? I can't make it work so far.

I use MagicalRecord (MR) to setup my Core Data stack. By default MR creates 2 contexts:

• one root context (on private queue)
• one for UI (the defaultContext) that is a child of the root context.

Which one should Ensembles know about ? The root or default ?

My code looks like that: [MagicalRecord setupCoreDataStackWithStoreNamed:@"store.sqlite"]; IDMSyncManager *syncManager = [IDMSyncManager sharedSyncManager]; syncManager.managedObjectContext = defaultContext; syncManager.storePath = [defaultContext.persistentStoreCoordinator.persistentStores.firstObject URL].path; [syncManager setup];

Thanks !

[cflorion]

I got rid of MagicalRecord method setup the Core Data stack and it's working... I don't understand the difference between manual setup and MagicalRecord one, weird.

But I still have this interrogation, is this a bad idea to use the root context for Ensemble ? This would mean that that changes would be synced by Ensembles only when the data changes get to the root context, and not at each save to the main context right ?

[drewmccormack]

Ensembles only observes contexts that save directly into the store. Any others are ignored, because they don't modify the store.

There are some gotchas with MR and using background async. The book goes into quite a bit of detail on how to handle it.

[drewmccormack]

One thing to be aware of is that you will likely have to mergeChanges... into both of your contexts. Again, the book covers this aspect.

[cflorion]

"Ensembles only observes contexts that save directly into the store" Good to know !

I just bought the book, this will be much easier thanks !