nsmanagedobject

I'm trying to update an entity and save the changes. I'm getting always the following error: The operation couldn’t be completed. (Cocoa error 1550.) Method: - (BOOL) updateEvent:(EventDTO*)eventDTO{ BOOL saved = YES; [self getDataCoreContext]; if (context) { NSError *error; Event *myEvent = (Event *)[context existingObjectWithID:eventDTO.entitysID error:&error]; myEvent.name = eventDTO.name; myEvent.descrptn = eventDTO.description; myEvent.date = eventDTO.date; myEvent.locLatitude = [eventDTO getLatidude]; myEvent.locLongitude = [eventDTO getLongitude]; myEvent.numberOfInvited= [NSNumber

I'm currently updating my project to Swift 3 and I'm moving all my NSDate methods and extensions to Date in order to keep the standard in the app. The problem is that I use Xcode to auto-generate my NSManagedObject subclasses and it is generating the date attributes as NSDate instead of Date. Is there a way to generate it with the date attributes as Date? EDIT Per Apple Developer Documentation : Core Data natively supports a variety of attribute types, such as string, date, and integer (represented as instances of NSString, NSDate and NSNumber respectively). So I think it's not possible =/ It

I have a data model for Formula 1 races with 3 entities: RacingActor: Abstract entity Pilot: inherits from RacingActor Team: inherits from RacingActor If I generate NSManagedObject subclasses to represent these entities, the code generated doesn't represent at all this design: Everything inherits from NSManagedObject Nothing prevents me from instantiating RacingActor The team property in Pilot is of type NSManagedObject instead of Team Is this the expected behaviour? Am I supposed to fix the code generated by Xcode? Am I missing something? BTW, I'm using Xcode 4.3.3 fabrice truillot de

I am working with coreData, I have one to many relationship between folders and files. I am using only one MOC through out my application .I am just passing it to different viewControllers , performing operations like add, edit, delete and then saving. My rootViewController uses NSfetchResultsController, I create folders using it, save and display on my table. saving I do it this way NSError *error; if (![self.managedObjectContext save:&error]) { // Replace this implementation with code to handle the error appropriately. // abort() causes the application to generate a crash log and terminate.

I need a proper way to count how many unique days there are in CoreData objects with a property of type NSDate. For example, I have the following: <Object>.date = "2014-05-15 21:29:12 +0000"; <Object>.date = "2014-05-15 21:49:34 +0000"; <Object>.date = "2014-05-16 13:29:23 +0000"; <Object>.date = "2014-05-16 20:49:50 +0000"; <Object>.date = "2014-05-16 22:01:53 +0000"; <Object>.date = "2014-05-20 03:32:12 +0000"; <Object>.date = "2014-05-20 12:45:23 +0000"; <Object>.date = "2014-05-20 14:15:50 +0000"; <Object>.date = "2014-05-20 20:20:05 +0000"; In this case, the result must be 3 because there