RestKit RKObjectMapping inested json

Question

Как сопоставить вложенный json ниже с помощью RestKit RKObjectMapping? Мне нужно только отобразить «данные». Мой текущий код ниже возвращает (null) - Спасибо!

{ 

    "sucess": true, 
    "error": { 
     "code": "", 
     "message": "" 
    }, 
    "data": [ 
     { 
      "id": 1, 
      "name": "Salad", 
      "description": "Salad Desc", 
      "category_id": 1 
     }, 
     { 
      "id": 2, 
      "name": "Soup", 
      "description": "Soup Desc", 
      "category_id": 1 
     }, 
     { 
      "id": 3, 
      "name": "Wrap", 
      "description": "Wrap Desc", 
      "category_id": 1 
     }, 
     { 
      "id": 4, 
      "name": "Appetizers", 
      "description": "Appetizers Desc", 
      "category_id": 1 
     } 
    ] 

} 

Класс

@interface Subcategory : NSObject  
    @property (nonatomic, retain) NSNumber *subcategoryID; 
    @property (nonatomic, retain) NSNumber *categoryID; 
    @property (nonatomic, retain) NSString *name; 
    @property (nonatomic, retain) NSString *description; 
    @property (nonatomic, retain) NSString *thumbnail; 
    @property (nonatomic, retain) NSArray *data; 

ViewController

RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Subcategory class]]; 

RKObjectMapping* dataMapping = [RKObjectMapping mappingForClass:[Subcategory class]]; 
[dataMapping mapKeyPath:@"id" toAttribute:@"subcategoryID"]; 
[dataMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"]; 
[dataMapping mapAttributes:@"name", @"description", nil]; 

[mapping mapKeyPath:@"data" toRelationship:@"data" withMapping:dataMapping]; 

[[RKObjectManager sharedManager] loadObjectsAtResourcePath:[NSString stringWith 

Answer 1

Вы пропускаете rootKeyPath, а также настройка отображения в поставщике:

RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[Subcategory class]];  
RKObjectMapping* dataMapping = [RKObjectMapping mappingForClass:[Subcategory class]]; 
[dataMapping mapKeyPath:@"id" toAttribute:@"subcategoryID"]; 
[dataMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"]; 
[dataMapping mapAttributes:@"name", @"description", nil]; 
dataMapping.rootKeyPath = @"data"; //this is what you were missing  
//get your mapping provider (i'm not sure if you already have on declared) 
[mappingProvider setObjectMapping:dataMapping forResourcePathPattern:@"/somepath/toservice/"]; 
[[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/somepath/toservice/"]; 

Вот больше информации, чтобы ответить на ваш Вопрос о добраться до других элементов (например, «ошибки»):

- (void)objectLoader:(RKObjectLoader *)objectLoader didFailWithError:(NSError *)error { 
    NSError *parseError = nil; 
    id response = [objectLoader.response parsedBody:&parseError]; 
    DLog(@"response %@", response);  
    if (!parseError) { 
     NSString *errorMessage = [[response valueForKey:@"error"] valueForKey:@"message"];  
     //do something with it  
    } 
}