RestKit对象映射-一个实体，两个映射

Question

在我的last question was solved之后，我从服务器接收到的JSON更改为下面的内容，我不得不处理映射以使用数据保存数据。

实体

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

JSON (来自服务器)

{
    "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，我想要映射来自“数据”加上键的所有数据，直到“实体”键()为止，但是找不到正确的解决方案。到目前为止，我为获取数据所做的映射看起来是这样的，而且运行良好，但当然忽略了“直到”-key。

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;

谢谢你的想法！

Answer 1

您可能需要执行两个映射。第一个映射将包围整个对象，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];

这将为您提供一个带有元数据的新对象，然后在容器的键属性上提供一个键对象数组。与使用rootKeyPath不同，您可以在0.9.4开发分支上使用基于resourcePath的映射注册(即将发布)。