EasyMapping有很多用法

Question

我有2个json文件，Checkpoint

{
   "city_id": 1,
   "code_number": "01248",
   "description": "\"км 6+300 а/д до с/т \"\"Лаванда\"\" от а/д \"\"Обход г. Тюмени\"\"  (поворот на км 3 + 750)\"",
   "hash": "c542a380e87ee3ddae153b22d504002e",
   "id": 771,
   "lat": 57.24386170206,
   "lon": 65.485205100524,
   "name": "\"с/о Текстильщик,  (с/о Текстильщик 2,  бывш. конечная)  (в город, м-т №36)\"",
   "routes_ids": [
       368,
       372,
       397,
       398,
       399,
       400,
       873
   ]
},

和路线

{
    "active_from": "2014-03-25",
    "active_to": "2024-01-01",
    "capacity_type": "",
    "checkpoints_ids": [
         319,
         321,
         338,
         ....
         3375
    ],
    "city_id": 1,
    "description": "Областная библиотека - с/о Липовый остров",
    "has_cars_for_disabled_persons": false,
    "hash": "49587333a979a22d93d09e4313661eaa",
    "id": 125,
    "name": "156",
    "route_type_id": 3
}

我正在使用easymapping将json映射到核心数据。这2个json文件在selfs之间有关系，在Checkpoint中有一个关键的routes_ids，它引用Route.id，而Route有关键的checkpoints_ids，它引用了Checkpoint.id。 这是我的映射： 路线映射

    + (EKManagedObjectMapping *)objectMapping{
         return [EKManagedObjectMapping                      mappingForEntityName:NSStringFromClass([self class]) withBlock:^(EKManagedObjectMapping *mapping){
                [mapping mapPropertiesFromArray:@[@"name"]];
                [mapping mapPropertiesFromDictionary:@{@"capacity_type":@"capacityType",
                       @"id":@"identifier",
                       @"description":@"sequenceDescription",
                       @"hash":@"objectHash"}];
                [mapping hasMany:[Checkpoint class] forKeyPath:@"checkpoints_ids" forProperty:@"identifier"];
         }];
    }

和检查点映射：

    + (EKManagedObjectMapping *)objectMapping{
         return [EKManagedObjectMapping mappingForEntityName:NSStringFromClass([self class]) withBlock:^(EKManagedObjectMapping *mapping){
                [mapping mapPropertiesFromArray:@[@"name"]];
                [mapping mapPropertiesFromDictionary:@{@"description":@"checkpointDescription",
                       @"id":@"identifier",
                       @"code_number":@"codeNumber",
                       @"lat":@"latitude",
                       @"lon":@"longtitude",
                       @"hash":@"objectHash"}];
                [mapping hasMany:[Route class] forKeyPath:@"routes_ids" forProperty:@"identifier"];
         }];
    }

这是日志：

2015-11-26 10:37:13.989 TTCore Light[5458:2197534] *** Assertion failure in -[EKManagedObjectMapping hasMany:forKeyPath:forProperty:withObjectMapping☺, /Users/tgt0/Desktop/test/TTCore Light/Pods/EasyMapping/EasyMapping/EKObjectMapping.m:245 
2015-11-26 10:37:13.992 TTCore Light[5458:2197534] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: [objectClass conformsToProtocol:@protocol(EKMappingProtocol)] || [objectClass conformsToProtocol:@protocol(EKManagedMappingProtocol)]' 
*** First throw call stack: 
(0x2476985b 0x35e2adff 0x24769731 0x254faddb 0x94d23 0x94b53 0x86cf9 0x8e989 0x86aab 0x88f0d 0x244e434b 0x1e161b 0x1d9f53 0x1e2b0f 0x1e2961 0x366e4e0d 0x366e49fc) 
libc++abi.dylib: terminating with uncaught exception of type NSException

我很有兴趣如何处理我的数组以建立正确的关系 我找不到关于这个框架的完整文档。或者也许有人可以向我推荐另一种具有最佳结果的解决方案（完整文档，性能等）