ios - RESTKit-postObject :path:parameters:success:failure: method always fails

Question

我正在尝试向服务器发送 POST 请求。我正在使用带有请求描述符的 RESTKit:

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");
                                              }];

问题是失败 block 总是被调用，即使我看到 POST 请求成功到达服务器。当我使用简单的 REST 客户端测试相同的 POST 请求时，我得到的状态代码是 200。

我得到的错误是:

Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 “没有响应描述符匹配加载的响应。” UserInfo=0x10c67adf0 {NSLocalizedFailureReason=从 URL 'http://bla.com/post' 加载了 200 响应，未能匹配所有 (0) 个响应描述符:，NSErrorFailingURLStringKey=http://bla.com/post， NSErrorFailingURLKey=http://bla.com/post, NSUnderlyingError=0x10c60add0 “在搜索的关键路径上找不到可映射的对象表示。”, keyPath=null, NSLocalizedDescription=没有响应描述符匹配加载的响应。

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？

编辑: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]];

服务器的响应是:

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

它仍然失败并出现相同的错误。

Answer 1

错误信息告诉你

"No mappable object representations were found at the key paths searched."

因此，要么您提供了错误的响应描述符，要么您没有定义响应描述符。提供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];