iphone – 来自嵌套字典的RestKit Map值

2019年8月4日 164次阅读

我正在收到像这样的
JSON响应

{
    "id" : 12345
    "course_name" : "history",
    "teacher" : "joy",
    "region" : {
                   "code" : "Al",
                   "name" : "Alabama"
               }
}

我在coredata中有一个课程实体,在代码中有一个相应的模型作为“MKCourse”,这个实体是这样的

MKCourse
  - id
  - courseName
  - teacher
  - regionCode
  - regionName

我在MKCourse中设置嵌套字典的值,如下所示 –

mapping = [RKManagedObjectMapping mappingForClass:[self class] inManagedObjectStore:[[RKObjectManager sharedManager] objectStore]];
    mapping.setDefaultValueForMissingAttributes = YES;
    mapping.setNilForMissingRelationships = YES;

    [mapping mapKeyPathsToAttributes:
     @"id", [self modelIdAttribute],
     @"course_name", @"courseName",
     @"teacher", @"teacher",
     @"region.code", @"regionCode",
     @"region.name", @"regionName",
     nil];

但它始终设置为regionCode和regionName为零.我不知道出了什么问题.是否有可能获得这样的价值观.

最佳答案 对于RestKit 2.添加以下代码：

[mapping addAttributeMappingFromKeyOfRepresentationToAttribute:@"region"];

并尝试addAttributeMappingsFromDictionary方法

[mapping addAttributeMappingsFromDictionary:@{
    @"id", [self modelIdAttribute],
     @"course_name", @"courseName",
     @"teacher", @"teacher",
     @"region.code", @"regionCode",
     @"region.name", @"regionName"
}];

不确定RestKit 1.0.也许你可以尝试将它们分开：

[mapping mapKeyPath:@"id" toAttribute:[self modelIdAttribute]];
[mapping mapKeyPath:@"course_name" toAttribute:@"courseName"];
[mapping mapKeyPath:@"teacher" toAttribute:@"teacher"];
[mapping mapKeyPath:@"region.code" toAttribute:@"regionCode"];
[mapping mapKeyPath:@"region.name" toAttribute:@"regionName"];
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