RestKit对象映射 - 一个实体，两个映射

Question

我的last question was solved后，我从服务器接收到的JSON更改为以下，我卡住处理映射以保存数据与核心数据。

实体

Key 
- alias 
- key 
- keyType 
- keyword 
- unid 
- until 

JSON（从服务器）

{ 
    "documents": 1026, 
    "configuration": 
    { 
     ... 
    }, 
    "data": 
    [ 
     { 
      "alias": "", 
      "key": "SALUTATION", 
      "keyType": "S", 
      "keyword": "Mr", 
      "unid": "" 
     }, 
     ... 
     { 
      "alias": "Automobile", 
      "key": "ACCOUNT_MARKET_SEGMENT", 
      "keyType": "A", 
      "keyword": "Automobile", 
      "unid": "" 
     } 
    ], 
    "documentsFound": 770, 
    "maxCount": -1, 
    "since": "20120326200001", 
    "until": "20120326211309" 
} 

现在我想地图从 “数据” 加密钥的所有数据 “直到” 为实体“Key”但找不到合适的解决方案。我的映射到目前为止获得的数据看起来像这样，运作良好，但错过了“直到” - 键，当然。

RKManagedObjectMapping* keyMapping = [RKManagedObjectMapping mappingForClass:[Key class]]; 
keyMapping.rootKeyPath = @"data"; 
[keyMapping mapKeyPath:@"key" toAttribute:@"key"]; 
[keyMapping mapKeyPath:@"keyword" toAttribute:@"keywordEN"]; 
[keyMapping mapKeyPath:@"alias" toAttribute:@"alias"]; 
keyMapping.setDefaultValueForMissingAttributes = YES; 

感谢您的想法！

Answer 1

你可能会想要做两个映射。第一个映射将包含整个对象，并与嵌套的“数据”路径有关系。

RKObjectMapping *keyMapping = [RKObjectMapping mappingForClass:[Key class]]; 
[keyMapping mapAttributes:@"alias", @"key", nil]; 
[keyMapping mapKeyPath:@"keyword" toAttribute:@"keywordEN"]; 

RKObjectMapping *outerMapping = [RKObjectMapping mappingForClass:[Container class]]; 
[outerMapping mapKeyPath:@"data" toRelationship:@"keys" withMapping:keyMapping]; 
[outerMapping mapAttributes:@"since", @"until", "maxCount", "documentsFound", nil]; 

这会给你一个新的对象与你的元数据，然后你的容器的keys属性上的关键对象的数组。您可以使用0.9.4开发分支上的基于resourcePath的映射注册（即将发布），而不是使用rootKeyPath。