Not Able to Migrate Persistent Store Away from iCloud - ios

Question

I am trying to remove the iCloud sync capability from a NSPersistentStore in my app. The migration does not return any errors, however, the data from the iCloud-enabled persistent store disappears after the migration.
The following is my relevant code:
-(void)setUpCoreDataStackWithICloud
{
//Set up the model and context.
self.model = [NSManagedObjectModel mergedModelFromBundles:nil];
self.context = [[NSManagedObjectContext alloc]init];
[self.context setMergePolicy:NSMergeByPropertyObjectTrumpMergePolicy];
if ([self isiCloudEnabledOnThisDevice]==YES) {
[self setUpiCloud];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setValue:[NSNumber numberWithBool:YES] forKey:#"lastLaunchOfAppiCloudWasEnabled"];
}else self.psc = [self persistentStoreCoordinatorForUserWithoutiCloudEnabled];
[self.context setPersistentStoreCoordinator:self.psc];
}
-(NSPersistentStoreCoordinator*)persistentStoreCoordinatorForUserThatAlreadyMigratedToiCloud
{
NSLog(#"persistentStoreCoordinatorForUserThatAlreadyMigratedToiCloud called");
NSPersistentStoreCoordinator *psc = [[NSPersistentStoreCoordinator alloc]initWithManagedObjectModel:self.model];
NSError *error = nil;
NSPersistentStore *store = [psc addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:[self newStoreURL]
options:[self iCloudStoreOptions]
error:&error];
if (!store) {
NSLog(#"failed to add store with error %#", [error localizedDescription]);
}else NSLog(#"successfully added store for user that has already migrated to iCloud");
NSDictionary *migrateOptions = #{ NSPersistentStoreRemoveUbiquitousMetadataOption : #YES,
NSMigratePersistentStoresAutomaticallyOption : #YES,
NSInferMappingModelAutomaticallyOption : #YES};
NSError *migrationError = nil;
NSPersistentStore *migratedStore = [psc migratePersistentStore:store toURL:[self testNewestStoreURL] options:migrateOptions withType:NSSQLiteStoreType error:&migrationError];
if (migrationError) {
NSLog(#"Migration from iCloud enabled persistent store was unsuccessful. %#", migrationError.localizedDescription);
}else NSLog(#"The migration from the iCloud enabled persistent store was successful");
NSLog(#"The migrated store is %#", migratedStore);
return psc;
}
-(NSURL*)testNewestStoreURL{
NSString *path = [self itemArchivePathWithAppendedString:#"test.data"];
NSURL *storeURL = [NSURL fileURLWithPath:path];
return storeURL;
}
-(NSURL*)newStoreURL
{
NSString *path = [self itemArchivePathWithAppendedString:#"cloudstore.data"];
NSURL *storeURL = [NSURL fileURLWithPath:path];
return storeURL;
}

Answer 1

The reason it won't work is because I am also doing a schema migration using a mapping model. iCloud doesn't support this according to the docs. Even though I am trying to get away from iCloud, it does not allow access to the data when there is a schema migration involved.