Question

我正在尝试向服务器发送POST请求。我正在使用RESTKit和请求描述符：

RKObjectMapping *messageRequestMapping = [RKObjectMapping requestMapping ];
[messageRequestMapping addAttributeMappingsFromArray:@[@"to", @"msg"]];

RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:messageRequestMapping objectClass:[PostMessage class] rootKeyPath:nil method:RKRequestMethodAny];

[objectManager addRequestDescriptor:requestDescriptor];

然后我正在使用postObject:path:parameters:success:failure:

PostMessage *postMessage = [PostMessage new];
    postMessage.to = self.pickedPerson.name;
    postMessage.msg = message.messgaeContent;
    [[RKObjectManager sharedManager] postObject:postMessage path:@"/post" parameters:nil
                                        success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
                                            NSLog(@"SUCCES: message sent to server");

                                        }
                                        failure:^(RKObjectRequestOperation *operation, NSError *error) {
                                            NSLog(@"WARNING");
                                              }];

问题是，即使我看到POST请求成功进入服务器，也始终会调用失败块。当我使用简单的REST客户端测试相同的POST请求时，我获得了200的状态代码。

我得到的错误是：

Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "No response descriptors match the response loaded." UserInfo=0x10c67adf0 {NSLocalizedFailureReason=A 200 response was loaded from the URL 'http://bla.com/post', which failed to match all (0) response descriptors:, NSErrorFailingURLStringKey=http://bla.com/post, NSErrorFailingURLKey=http://bla.com/post, NSUnderlyingError=0x10c60add0 "No mappable object representations were found at the key paths searched.", keyPath=null, NSLocalizedDescription=No response descriptors match the response loaded.}

我不确定是否必须设置responseDescriptor。我不能像设置responseDescriptor时那样设置预期的状态代码吗？

修改：我添加了一个响应描述符：

// message response after a post
    RKObjectMapping *messageResponseForPostMapping = [RKObjectMapping mappingForClass:[PostMessage class]];
    [messageResponseForPostMapping addAttributeMappingsFromArray:@[@"success"]];

RKResponseDescriptor *messageResponseForPostDescriptor =
[RKResponseDescriptor responseDescriptorWithMapping:messageResponseForPostMapping
                                             method:RKRequestMethodPOST
                                        pathPattern:@"post"
                                            keyPath:@""
                                        statusCodes:[NSIndexSet indexSetWithIndex:200]]; 
[objectManager addResponseDescriptorsFromArray:@[messageResponseDescriptor, personResponseDescriptor, messageResponseForPostDescriptor]];

作为服务器的响应是：

{
  "success" : "Message sent successfully."
}

并且仍然以相同的错误失败。

Answer 1

错误消息告诉您

＆＃34;在搜索的关键路径中找不到可映射的对象表示。＆＃34;

所以，要么你给了一个不正确的响应描述符，要么你没有定义一个。给出正确的响应描述符应该可以解决问题。

这是一个示例响应描述符：

RKObjectMapping* mapping = [RKObjectMapping mappingForClass:<YOURCLASSHERE>];
...
RKResponseDescriptor * responseDescriptor = [RKResponseDescriptor
    responseDescriptorWithMapping:mapping
    method:RKRequestMethodPOST
    pathPattern:path keyPath:nil
    statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptor:responseDescriptor];

Answer 2

我实际上并没有发现我的响应描述符有什么问题。我处理这个问题的方法是更改服务器上的响应。服务器现在发送的响应代码为201，而RESTKit不再发生故障，而不是发送回json文件。

RESTKit - postObject：path：parameters：success：failure：方法总是失败

2 个答案: