Turns out, my model version for the older store had gotten modified. I restored 
that, but then I had to re-create the mapping file. After that, automatic 
migration picked it up and tried to use my policies! Onward and upward…

On Jul 18, 2014, at 02:59 , Rick Mann <[email protected]> wrote:

> I'm trying to do a custom core data migration, but I'm running into an issue 
> getting the model for the older data:
> 
>    NSDictionary* metadata = [NSPersistentStoreCoordinator 
> metadataForPersistentStoreOfType: NSSQLiteStoreType URL: storeURL error: 
> &err];
>    NSManagedObjectModel* sourceModel = [NSManagedObjectModel 
> mergedModelFromBundles: nil forStoreMetadata: metadata];
> 
> metadata is valid, but sourceModel is nil.
> 
> I have several versions of the same model in my (iOS) app. According to the 
> docs, passing nil here is the right thing to do.
> 
> Any ideas? Thanks!
> 
> 
> -- 
> Rick Mann
> [email protected]
> 
> 
> 
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-- 
Rick Mann
[email protected]



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