On Oct 22, 2011, at 09:18 PM, Jens Alfke wrote:
>
> On Oct 22, 2011, at 11:59 AM, Martin Hewitson wrote:
>
>> -migratePersistentStore:toURL:options:withType:error:
>> Still, the core data iCloud integration remains sufficiently mysterious...
>
> That method’s been around since 10.4; AFAIK it just does a “save as”
> operation to a new file. Is there some other documentation that says it works
> specially with iCloud?
This is not an iCloud specific thing. On the "What's New in Core Data on the
Mac" video, they discuss iCloud syncing and there they say that the sqlite
store should be used to allow diffs to be synced. They don't say what happens
if the store is not sqlite. I just wanted to be prepared to be able to migrate
from an XML store to an sqlite store, if needed. This method does that fore me.
>
> I haven’t seen anything that implies any special treatment of CoreData
> documents in iCloud besides just copying the entire file at once (a la
> Dropbox.) Did I miss something that says that iCloud will sync docs at the
> row/record/object level? If it does that, how does it handle sync conflicts,
> partial syncs, and referential integrity?
Again, this is discussed in that same video. They give an example of contact
records being synced and updated from different devices, and they discuss how
the conflict resolution is handled.
Again, this is all shoebox-app specific so far. I don't know if this all
applies to document-based apps.
The part that stumps me is how to merge the records received from the cloud. I
can't find a sample app nor any documentation.
Martin
>
> —Jens
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer
Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: [email protected]
WWW: http://www.aei.mpg.de/~hewitson
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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