RestKit映射多個類型的陣列

Question

我具有以下JSON：

{ 
    "stream": [{ 
     "catalog": {} 
    }, { 
     "catalog": {} 
    }, { 
     "user": {} 
    }] 
} 

與以下映射規則：直到多個對象類型是在流中

[RKResponseDescriptor responseDescriptorWithMapping:catalogMapping 
             pathPattern:nil keyPath:@"stream.catalog" 
             statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]]; 

[RKResponseDescriptor responseDescriptorWithMapping:userMapping 
             pathPattern:nil keyPath:@"stream.user" 
             statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]]; 

映射工作正常。當流包含多個對象，說用戶和目錄restkit失敗此斷言：

NSCAssert([representation isKindOfClass:[NSDictionary class]], @"Expected a dictionary representation"); 

有沒有一種方法映射結構？

Answer 1

我有一個豪華請求一個API的變化，所以我們搬到

{ 
    "stream": [{ 
     "type": "catalog", 
     "other": "fields" 
    }, { 
     "type": "catalog" 
     "other": "fields" 
    }, { 
     "type": "user" 
     "other": "fields" 
    }] 
} 

的，現在我使用動態映射：

RKDynamicMapping* dynamicMapping = [RKDynamicMapping new]; 
    [dynamicMapping setObjectMappingForRepresentationBlock:^RKObjectMapping *(id representation) { 
     if ([[representation objectForKey:@"type"] isEqualToString:@"catalog"]) { 
      return catalogMapping; 
     } else if ([[representation objectForKey:@"type"] isEqualToString:@"user"]) { 
      return userMapping; 
     } 
//  ... 
    }]; 


    [manager addResponseDescriptor:[RKResponseDescriptor responseDescriptorWithMapping:dynamicMapping 
                      pathPattern:nil keyPath:@"stream" 
                      statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]];