RestKit如何发布对象

Question

我正在使用Rest Kit 0.20.3和Xcode 5来创建应用程序。我已经完成了GET请求，并从服务器获取了2个对象。现在我创建了一个具有两个文本字段的视图来输入playerName和playerAge。 我试过下面的代码来发布新的球员到服务器，但它不工作：

AddPlayerViewController.h

#import <RestKit/RestKit.h> 
#import "Player.h" 

@interface AddPlayerViewController : UIViewController 

@property (nonatomic, strong) Player *addedPlayer; 

@property (weak, nonatomic) IBOutlet UITextField *playerNameTxt; 
@property (weak, nonatomic) IBOutlet UITextField *playerAgeTxt; 

- (IBAction)save:(id)sender; 
@end 

AddPlayerViewController.m

@implementation AddPlayerViewController 

- (IBAction)save:(id)sender { 

    [self postObject]; 
} 

-(void)postObject{ 

    [[RKObjectManager sharedManager] postObject:addedPlayer path:@"/players.json" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { 
     addedPlayer.playerName = playerNameTxt.text; 
     NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc]init]; 
     [numberFormatter setNumberStyle:NSNumberFormatterNoStyle]; 
     addedPlayer.playerAge = [numberFormatter numberFromString:[NSString stringWithFormat:@"%@",playerAgeTxt.text]]; 
    } failure:^(RKObjectRequestOperation *operation, NSError *error) { 
    }]; 
} 
@end 

，我发现了以下errror：

Expected status code in (200), got 422, AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0xaf67e60> { URL: http://localhost:3000/players.json} 

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
    RKLogConfigureByName("RestKit", RKLogLevelWarning); 
    RKLogConfigureByName("RestKit/ObjectMapping", RKLogLevelTrace); 
    RKLogConfigureByName("RestKit/Network", RKLogLevelTrace); 

    RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"http://192.168.1.3:3010"]]; 

    RKObjectMapping *playerMapping = [RKObjectMapping mappingForClass:[Player class]]; 

    [playerMapping addAttributeMappingsFromDictionary:@{@"id": @"playerID", 
                 @"name": @"playerName", 
                 @"age" : @"playerAge", 
                 @"created_at": @"createdAt", 
                 @"updated_at": @"updatedAt"}]; 



    RKResponseDescriptor *responseDesc = [RKResponseDescriptor responseDescriptorWithMapping:playerMapping method:RKRequestMethodAny pathPattern:@"/players.json" keyPath:nil statusCodes:[NSIndexSet indexSetWithIndex:200]]; 

    [objectManager addResponseDescriptor:responseDesc]; 


    RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:[playerMapping inverseMapping] objectClass:[Player class] rootKeyPath:@"/players.json" method:RKRequestMethodPOST]; 

    [objectManager addRequestDescriptor:requestDescriptor]; 
    return YES; 
} 

Player.h

@interface Player : NSObject 

@property (nonatomic,strong) NSNumber *playerID; 
@property (nonatomic,strong) NSString *playerName; 
@property (nonatomic,strong) NSNumber *playerAge; 
@property (nonatomic,strong) NSDate *createdAt; 
@property (nonatomic,strong) NSDate *updatedAt; 

@end 

在服务器端，我得到这样的：

Started POST "/players.json" for 192.168.1.3 at 2013-11-01 20:01:34 +0530 
Processing by PlayersController#create as JSON 
    Parameters: {"/players.json"=>{"age"=>"40", "name"=>"sachin"}} 
Completed 400 Bad Request in 0ms 

ActionController::ParameterMissing (param not found: player): 
    app/controllers/players_controller.rb:73:in `player_params' 
    app/controllers/players_controller.rb:28:in `create' 

Answer 1

它看起来像你的服务器要求与 “玩家”

的ActionController :: ParameterMissing对象（PARAM未发现：球员）：

和你逝去“/players.json”

参数：{ “/players.json"=>{"age"=>"40”， “名”=> “萨钦”}}

试着改变你的帖子路径只是“玩家” 在Xcode

[[RKObjectManager sharedManager] postObject:addedPlayer path:@"player" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { 

和

RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:[playerMapping inverseMapping] objectClass:[Player class] rootKeyPath:@"player" method:RKRequestMethodPOST]; 

Answer 2

我建议你要做到这一点：

addedPlayer.playerName = playerNameTxt.text; 

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc]init]; 
[numberFormatter setNumberStyle:NSNumberFormatterNoStyle]; 
addedPlayer.playerAge = [numberFormatter numberFromString:[NSString stringWithFormat:@"%@",playerAgeTxt.text]]; 

[[RKObjectManager sharedManager] postObject:addedPlayer path:@"/players.json" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { 
    NSLog(@"Yay - life is great!"); 
} failure:^(RKObjectRequestOperation *operation, NSError *error) { 
    NSLog(@"Bum: %@", error); 
}]; 

---

从你更新的日志：

RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:[playerMapping inverseMapping] objectClass:[Player class] rootKeyPath:@"player" method:RKRequestMethodPOST];