Lightweight Core Data migration setup

ConnectionService.m

- (void)defineCoreData
{
    // Complete Core Data stack initialization
    [managedObjectStore createPersistentStoreCoordinator];
    NSDictionary *options = @{
                              NSMigratePersistentStoresAutomaticallyOption : @YES,
                              NSInferMappingModelAutomaticallyOption : @YES
                              };
    NSString *storePath = [RKApplicationDataDirectory() stringByAppendingPathComponent:[self propertyFromPlist:@"Settings" withKey:@"db_name"]];
    NSString *seedPath = [[NSBundle mainBundle] pathForResource:@"RKSeedDatabase" ofType:@"sqlite"];
    NSError *error;
    NSPersistentStore *persistentStore = [self.managedObjectStore addSQLitePersistentStoreAtPath:storePath
                                                                          fromSeedDatabaseAtPath:seedPath
                                                                               withConfiguration:nil
                                                                                         options:options
                                                                                           error:&error];
    
    NSAssert(persistentStore, @"Failed to add persistent store with error: %@", error);
    
    // Create the managed object contexts
    [self.managedObjectStore createManagedObjectContexts];
    
    // Configure a managed object cache to ensure we do not create duplicate objects
    self.managedObjectStore.managedObjectCache = [[RKInMemoryManagedObjectCache alloc] initWithManagedObjectContext:self.managedObjectStore.persistentStoreManagedObjectContext];
}