RestKit实体映射

Question

嗨，有人可以教我如何做嵌套的Restkit实体映射？我一直得到错误信息，而调试，下面是我的错误信息和代码

[__NSSetM insertObject:atIndex:]：无法识别的选择发送到实例0x95269d0

JSON数据

Family =(
     { 
     id = "1"; 
     parentName = "Mr John"; 
     Child =(
       { 
       parentID = "1"; 
       childName = "James"; 
       age = "18"; 

      }, 
      { 
       parentID = "1"; 
       childName = "ruby"; 
       age = "19"; 
           }, 
          { 
       parentID = "1"; 
       childName = "ella"; 
       age = "20"; 
      } 
     ); 
    } 
); 

我AppDelegate.m

RKEntityMapping *familyMapping = [RKEntityMapping mappingForEntityForName:@"Family" inManagedObjectStore:managedObjectStore]; 
debtorMapping.identificationAttributes = @[ @"id" ]; 

[familyMapping addAttributeMappingsFromDictionary:@{ 
@"id": @"accNo", 
@"parentName": @"companyName" 
}]; 


RKEntityMapping *childMapping = [RKEntityMapping mappingForEntityForName:@"Child" inManagedObjectStore:managedObjectStore]; 

childMapping.identificationAttributes = @[ @"parentID"]; 

[childMapping addAttributeMappingsFromDictionary:@{ 
@"parentID": @"parentID", 
@"childName": @"childName", 
@"age": @"age" 
}]; 


[familyMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"Child" toKeyPath:@"Child" withMapping:childMapping]]; 


RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:familyMapping 
                        pathPattern:nil 
                         keyPath:@"Family" 
                        statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; 


[objectManager addResponseDescriptor:responseDescriptor]; 

家庭NSManagedObject

@class Child; 
@interface Family : NSManagedObject 
@property (nonatomic, retain) NSString * id; 
@property (nonatomic, retain) NSString * parentName; 
@property (nonatomic, retain) NSSet *child; 
@end 
@interface Family (CoreDataGeneratedAccessors) 
- (void)addChildObject:(Child *)value; 
- (void)removeChildObject:(Child *)value; 
- (void)addChild:(NSSet *)values; 
- (void)removeChild:(NSSet *)values; 
@end 

儿童NSManageObject

@class Family; 
@interface Child : NSManagedObject 
@property (nonatomic, retain) NSString * parentID; 
@property (nonatomic, retain) NSString * childName; 
@property (nonatomic, retain) NSString * age; 
@property (nonatomic, retain) Family *family; 
@end 

Answer 1

我发现我错了。 [familyMapping addPropertyMapping：[RKRelationshipMapping relationshipMappingFromKeyPath：@“Child”toKeyPath：@“child”withMapping：childMapping]]; toKeyPath字符串应该用小写字母来指定。 “遵循核心数据关系字符串”。