RestKit - 不是键值编码兼容，在JSON中没有根

我一直在尝试从JSON响应映射下面的对象，并从控制台输出中看到的所有内容中，没有任何理由为什么映射不是“T成功 - 我很感激，如果任何人都可以有一个检查，看看：RestKit - 不是键值编码兼容，在JSON中没有根

@interface RKElectionsModel : NSObject 

@property (nonatomic, assign) bool isActive; 
@property (nonatomic, strong) NSNumber *electionID; 
@property (nonatomic, strong) NSString *title; 
@property (nonatomic, strong) NSString *summary; 
@property (nonatomic, strong) NSNumber *availableSeats; 
@property (nonatomic, strong) NSNumber *candidatesCount; 
@property (nonatomic, strong) NSNumber *withdrawnCount; 
@property (nonatomic, strong) NSSet *candidates; 

@end 

/** 
* Election Detail Mapping: Getting all election details, we have some extra information from 
* the API call 
* 
*/ 
RKObjectMapping *electionDetailsMapping = [RKObjectMapping mappingForClass:[RKElectionsModel class]]; 

// Map JSON -> entities 
[electionDetailsMapping addAttributeMappingsFromDictionary:@{ 
    @"id": @"electionID", 
    @"title": @"title", 
    @"summary": @"summary", 
    @"active": @"isActive", 
    @"availableSeats": @"availableSeats", 
    @"candidatesCount": @"candidatesCount", 
    @"withdrawnCount": @"withdrawnCount" 
}]; 

// Register our mappings with the provider 
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:electionDetailsMapping pathPattern:@"/api/elections/:electionID/all" keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];

Console output上引擎收录和JSON响应的任何实例，您可以访问here

得到任何帮助，刘易斯

来源

2013-03-23 Lewis

看起来像你试图将NSString映射到NSNumber。

在您的NSObject尝试添加以下验证并将映射启动时从服务器接收的字符串转换为NSNumber。

- (BOOL)validateAvailableSeats:(id *)ioValue error:(NSError **)outError { 
     // Force the value to be a NSNumber 
     *ioValue = [NSNumber numberWithDouble:[(NSString*)value doubleValue] ] 
     return YES; 
}

在RestKit Wiki你会发现你的价值更多的转换。

来源

2013-03-27 10:59:01 flashfabrixx

RestKit - 不是键值编码兼容，在JSON中没有根

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