Thinking about it more, your method doesn't really make sense. In order to use a context it must be associated with a persistent store coordinator, in order to know its model. So it doesn't make sense to create the coordinator lazily. Instead, make *adding the store* be the lazy bit
Sent from my iPad On 16 Feb 2013, at 19:06, Laurent Daudelin <laur...@nemesys-soft.com> wrote: > Hey Mike. > > No assertions have ever been fired, which I thought was weird a bit as well. > BTW, this is on iOS, not Mac OS X if that makes any difference. > > -Laurent. > -- > Laurent Daudelin > AIM/iChat/Skype:LaurentDaudelin > http://www.nemesys-soft.com/ > Logiciels Nemesys Software > laur...@nemesys-soft.com > > On Feb 16, 2013, at 02:00, Mike Abdullah <cocoa...@mikeabdullah.net> wrote: > >> >> On 16 Feb 2013, at 00:37, Laurent Daudelin <laur...@nemesys-soft.com> wrote: >> >>> I got a few crash reports from users that have a problem with my CoreData >>> app. >>> >>> Given the following code: >>> >>> /* >>> Returns the persistent store coordinator for the application. >>> If the coordinator doesn't already exist, it is created and the >>> application's store added to it. >>> */ >>> - (NSPersistentStoreCoordinator *)persistentStoreCoordinator >>> { >>> if (_persistentStoreCoordinator == nil) { >>> NSURL *storeUrl = [NSURL fileURLWithPath:self.persistentStorePath]; >>> _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] >>> initWithManagedObjectModel:[NSManagedObjectModel >>> mergedModelFromBundles:nil]]; >>> NSError *error = nil; >>> NSPersistentStore *persistentStore = [_persistentStoreCoordinator >>> addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl >>> options:nil error:&error]; >>> NSAssert3(persistentStore != nil, @"%s at %d: Unhandled error adding >>> persistent store: %@", __FUNCTION__, __LINE__, [error >>> localizedDescription]); >>> NSLog(@"Created persistent store '%@' at URL %@", >>> persistentStore, storeUrl); >>> } >>> return _persistentStoreCoordinator; >>> } >>> >>> When the MOC tries to perform a save, an exception is generated: >>> >>> Exception reason >>> >>> This NSPersistentStoreCoordinator has no persistent stores. It cannot >>> perform a save operation. >>> >>> Stacktrace >>> >>> PRIMARY THREAD THREAD 0 >>> >>> • 0 CoreFoundation 0x356212a3 __exceptionPreprocess + 163 >>> • 1 libobjc.A.dylib 0x3393197f objc_exception_throw + 31 >>> • 2 CoreData 0x36f2dfef -[NSPersistentStoreCoordinator >>> executeRequest:withContext:error:] + 299 >>> • 3 CoreData 0x36f862d3 -[NSManagedObjectContext save:] + 731 >>> >>> How can the persistent store not being existing? >> >> Well you whacked in some assertions that failures never happen (generally a >> bad idea for disk access. It *is* going to fail sometime). Have those >> assertions fired? > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
