Rails way to change current json output - ruby-on-rails

Question

I'm working with the JSON below. The outer label is missing.
[{
"id":1,
"updated_at":"2012-01-13T17:13:47Z",
"created_at":"2012-01-13T17:13:47Z",
"name":"dave"},
{
"id":2,
"updated_at":"2012-01-13T17:13:55Z",
"created_at":"2012-01-13T17:13:55Z",
"name":"steve"
}]
I think RestKit expects
{***people:***
[{
"id":1,
"updated_at":"2012-01-13T17:13:47Z",
"created_at":"2012-01-13T17:13:47Z",
"name":"dave"},
{
"id":2,
"updated_at":"2012-01-13T17:13:55Z",
"created_at":"2012-01-13T17:13:55Z",
"name":"steve"
}]
}
#interface Data : NSObject {
Person *person;
NSArray *dogs;
}
#property (nonatomic ,retain) Person *person;
#property (nonatomic ,retain) NSArray *dogs;
#end
#interface Person : NSObject {
NSString *name;
NSNumber *personId;
NSDate *updatedAt;
NSDate *createdAt;
}
#property (nonatomic , retain) NSDate * createdAt;
#property (nonatomic , retain) NSDate * updatedAt;
#property (nonatomic , retain) NSNumber *personId;
#property (nonatomic , retain) NSString *name;
#end
Here is my mapping:
RKObjectMapping* userMapping = [RKObjectMapping mappingForClass:[Person class]];
[userMapping mapKeyPath:#"updated_at" toAttribute:#"updatedAt"];
[userMapping mapKeyPath:#"created_at" toAttribute:#"createdAt"];
[userMapping mapKeyPath:#"name" toAttribute:#"name"];
[userMapping mapKeyPath:#"id" toAttribute:#"personId"];
RKObjectMapping* dogMapping = [RKObjectMapping mappingForClass:[Dog class]];
[dogMapping mapKeyPath:#"created_at" toAttribute:#"createdAt"];
[dogMapping mapKeyPath:#"person_id" toAttribute:#"spersonId"];
[dogMapping mapKeyPath:#"name" toAttribute:#"name"];
[dogMapping mapKeyPath:#"updated_at" toAttribute:#"updatedAt"];
[dogMapping mapKeyPath:#"id" toAttribute:#"dogId"];
[[RKObjectManager sharedManager].mappingProvider setMapping:userMapping
forKeyPath:#"person"];
RKObjectRouter * router = [RKObjectManager sharedManager].router;
[router routeClass: [Person class] toResourcePath:#"/people/:personId"];
[router routeClass: [Person class] toResourcePath:#"/people"
forMethod:RKRequestMethodPOST];
RKObjectMapping *personSerializationMapping= [RKObjectMapping mappingForClass:
[NSDictionary class]];
[personSerializationMapping mapKeyPath:#"name" toAttribute:#"person[name]"];
[[RKObjectManager sharedManager].mappingProvider
setSerializationMapping:personSerializationMapping forClass: [Person class]];
Person* dave =[[Person alloc]init ];
dave.name = #"data";
NSLog(#"%#", [daveLiu name]);
//NSLog("name is %#", daveLiu.description );
[[RKObjectManager sharedManager] postObject:dave delegate:self];
UPDATE! I got the above code to work. It will save to the rails server, but I'm getting a keypath error still!
Processing PeopleController#create (for 127.0.0.1 at 2012-01-16 06:12:18) [POST]
Parameters: {"person"=>{"name"=>"data"}}
Person Create (0.4ms) INSERT INTO "people" ("updated_at", "created_at", "name") VALUES('2012-01-16 14:12:18', '2012-01-16 14:12:18', 'data')
Completed in 11ms (View: 1, DB: 0) | 200 OK [http://localhost/people]
W restkit.object_mapping:RKObjectMapper.m:60 Adding mapping error: Could not find an object mapping for keyPath: ''
E restkit.network:RKObjectLoader.m:178 Encountered errors during mapping: Could not find an object mapping for keyPath: ''
Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "Could not find an object mapping for keyPath: ''" UserInfo=0x4e6c4e0 {=RKObjectMapperKeyPath, NSLocalizedDescription=Could not find an object mapping for keyPath: ''}