MagicalRecord выборку двух объектов с строки и разделы и сортировки Разделы

Question

я два объекта GroupExercise < ---- >> Exercise, и что нужно сделать запрос на выборку Tableview с разделами (заголовок GroupExercise.name) и строк (Exercise.name) , как я могу принести два объекта Magical записи или Core Data

объект Упражнение

@interface Exercise : NSManagedObject 
    @property (nonatomic, retain) NSString * name; 
    @property (nonatomic, retain) NSNumber * timeRelax; 
    @property (nonatomic, retain) NSNumber * type; 
    @property (nonatomic, retain) NSNumber * uid; 
    @property (nonatomic, retain) NSNumber * uidGroup; 
    @property (nonatomic, retain) GroupExercise *groupEdge; 

GroupExerciseObject

@property (nonatomic, retain) NSString * name; 
@property (nonatomic, retain) NSString * tagColor; 
@property (nonatomic, retain) NSNumber * uid; 
@property (nonatomic, retain) NSOrderedSet *exerciseEdge; 

сохранения объектов с кодом

- (void)parseAndSaveJson:(id)json withCompleteBlock:(void (^)())completeBlock { 

NSMutableArray *groupsArray = (NSMutableArray *) json; 

NSLog(@"%@", json); 

if (groupsArray != nil) { 

    NSArray *allEntities = [NSManagedObjectModel MR_defaultManagedObjectModel].entities; 

    [allEntities enumerateObjectsUsingBlock:^(NSEntityDescription *entityDescription, NSUInteger idx, BOOL *stop) { 
     [NSClassFromString([entityDescription managedObjectClassName]) MR_truncateAll]; 
    }]; 

    [MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) { 


     for (int groupIndex = 0; groupIndex < [groupsArray count]; groupIndex++) { 


      GroupExercise *localGroup = [GroupExercise MR_createEntityInContext:localContext]; 

      localGroup.name = groupsArray[groupIndex][LOCAL_GROUPS_NAME]; 

      localGroup.tagColor = groupsArray[groupIndex][LOCAL_GROUPS_TAG_COLOR]; 

      localGroup.uid = @([groupsArray[groupIndex][LOCAL_GROUPS_ID_GROUP] intValue]); 


      NSMutableArray *exerciseArray = (NSMutableArray *) groupsArray[groupIndex][LOCAL_GROUPS_EXERCISES]; 

      NSMutableSet *set = [[NSMutableSet alloc] init]; 

      for (int exerciseIndex = 0; exerciseIndex < [exerciseArray count]; exerciseIndex++) { 

       Exercise *exercise = [Exercise MR_createEntityInContext:localContext]; 

       exercise.name = exerciseArray[exerciseIndex][EXERCISE_NAME]; 
       exercise.uid = @([exerciseArray[exerciseIndex][LOCAL_EXERCISE_ID_EXERCISE] intValue]); 
       exercise.uidGroup = @([groupsArray[groupIndex][LOCAL_GROUPS_ID_GROUP] intValue]); 
       exercise.groupEdge = localGroup; 

       [set addObject:exercise]; 
      } 

      [localGroup addExerciseEdge:set]; 
     } 

    }     completion:^(BOOL contextDidSave, NSError *error) { 

     completeBlock(); 

    }]; 
} 
} 

и использовать FRC

- (NSFetchedResultsController *)fetchedResultsController { 
if (_fetchedResultsController != nil) { 
    return _fetchedResultsController; 
} 

_fetchedResultsController = [Exercise MR_fetchAllGroupedBy:@"groupEdge" withPredicate:nil sortedBy:@"uid" ascending:true]; 


_fetchedResultsController.delegate = self; 
return _fetchedResultsController; 
} 

как я могу сортировать разделы с groupEdge.name?

Answer 1

я решил с кодом

_fetchedResultsController = [Exercise MR_fetchAllGroupedBy:@"groupEdge" withPredicate:nil sortedBy:@"uidGroup,uid" ascending:true];