RDNCluster mapping

gistfile1.m

+ (EKManagedObjectMapping *)objectMapping {
    return [EKManagedObjectMapping mappingForEntityName:NSStringFromClass(self) withBlock:^(EKManagedObjectMapping *mapping) {
        mapping.primaryKey = @"clusterId";
        [mapping mapPropertiesFromArray:@[@"title"]];
        [mapping mapPropertiesFromDictionary:@{
                                               @"id" : @"clusterId"
                                               }];
        
        [mapping mapKeyPath:@"related" toProperty:@"childClusters" withValueBlock:^id(NSString *key, NSArray * relatedArray, NSManagedObjectContext *context) {
            EKManagedObjectMapping *clusterMapping = [RDNCluster relatedObjectMapping];
            NSArray *clusters = [EKManagedObjectMapper arrayOfObjectsFromExternalRepresentation:relatedArray
                                                                       withMapping:clusterMapping
                                                            inManagedObjectContext:context];
            return [NSOrderedSet orderedSetWithArray:clusters];
        }];
    }];
}

+ (EKManagedObjectMapping *)relatedObjectMapping {
    return [EKManagedObjectMapping mappingForEntityName:NSStringFromClass(self) withBlock:^(EKManagedObjectMapping *mapping) {
        mapping.primaryKey = @"clusterId";
        [mapping mapPropertiesFromArray:@[@"title"]];
        [mapping mapPropertiesFromDictionary:@{
                                               @"id" : @"clusterId"
                                               }];
    }];
}