我正在尝试将我的核心数据“组件”实体映射到此响应JSON中的“热点”键路径,但它只会到达数组对象,因此它不会映射。我无法判断我的问题是映射还是响应描述符或两者的组合。
"result" : {
"type" : "Slidedeck",
"id" : 81,
"name" : "Brendantest",
"slides" : [
{
"thumb" : "http:\/\/api.idetailapp.review.thingee.com\/v4\/resources\/1294\/download\/slide?thumb=true",
"id" : 1294,
"notes" : "",
"label" : "",
"order" : 1,
"parent_id" : 81,
"file" : "slide-20.jpg",
"components" : {
"hotspots" : [
{
"x" : 205,
"options" : "embedded",
"type" : "video",
"id" : 6082,
"y" : 453,
"assets" : [
{
"thumb" : "\/system\/asset_objects\/14\/original_thumb\/14.png",
"id" : 14,
"parent_id" : 6082,
"file" : "slide_15_chart_animation_ipad_r03.mov",
"url" : "http:\/\/api.idetailapp.review.thingee.com\/v4\/resources\/14\/download\/asset"
}
],
"parent_id" : 1294,
"width" : 320,
"height" : 246
}
]
},
"url" : "http:\/\/api.idetailapp.review.thingee.com\/v4\/resources\/1294\/download\/slide"
}
],
"version" : "0.43"
} }
这是我的RKEntityMapping:
RKEntityMapping *mapping = [RKEntityMapping mappingForEntityForName:@"Component"
inManagedObjectStore:[RKManagedObjectStore defaultStore]];
mapping.identificationAttributes = @[ @"componentID" ];
[mapping addAttributeMappingsFromDictionary:@{@"id": @"componentID",
@"parent_id": @"parentID"
}];
[mapping addAttributeMappingsFromArray:@[@"x", @"y", @"width", @"height", @"type", @"options"]];
这是我的Responsedescriptor:
componentResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:componentEntityMapping
method:RKRequestMethodAny pathPattern:nil
keyPath:@"result.slides.components.hotspots" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
我输入了RestKit / ObjectMapping调试跟踪并获得以下输出:
Asked to map source object (
{
assets = (
{
file = "slide_15_chart_animation_ipad_r03.mov";
id = 14;
"parent_id" = 6082;
thumb = "/system/asset_objects/14/original_thumb/14.png";
url = "http://api.idetailapp.review.thingee.com/v4/resources/14/download/asset";
}
);
height = 246;
id = 6082;
options = embedded;
"parent_id" = 1294;
type = video;
width = 320;
x = 205;
y = 453;
}
进一步调试消息:
将keyPath'id'的值转换为'NSNumber'类型的表示失败:Error Domain = org.restkit.RKValueTransformers.ErrorDomain Code = 3002“值转换失败”(
6082
)UserInfo = 0x12479350 {NSLocalizedDescription =预期inputValue
类型NSNull
,但得到__NSArrayI
。}“
),
答案 0 :(得分:1)
您的问题是keyPath:@"result.slides.components.hotspots"
。
具体而言,slides
是一个数组。
结果是要求RestKit将一组对象映射到您的映射中。因此,当它试图获取id
(应该是一个数字)时,它会得到一个数组(因此你的错误)。这是因为在数组上调用valueForKey:
会返回一个数组...
所以,基本上,你不能按照你想要的方式去做,因为JSON中间的数组。
如果您可以更改JSON,请执行此操作。如果不能,则需要更改映射以首先映射slides
然后映射嵌套组件(如果需要,可以随后丢弃幻灯片)。