尝试使用RestKit从JSON映射深层嵌套对象时出错。首先，我尝试映射正常工作的酒店名称。但是，当我试图从＆＃34; ChargeableRateInfo＆＃34;从JSON我得到以下错误：
restkit.object_mapping：RKMappingOperation.m：652警告：失败 映射嵌套对象：（null）
这是我想要映射的JSON示例：
{
"HotelListResponse": {
"customerSessionId": "0ABAAA3E-7637-1591-4F62-5548AC792D42",
"numberOfRoomsRequested": 1,
"moreResultsAvailable": true,
"cacheKey": "-48763715:14f65548ac7:2d4e",
"cacheLocation": "10.186.170.62:7300",
"cachedSupplierResponse": {
"@supplierCacheTolerance": "NOT_SUPPORTED",
"@cachedTime": "0",
"@supplierRequestNum": "235",
"@supplierResponseNum": "1",
"@supplierResponseTime": "503",
"@candidatePreptime": "30",
"@otherOverheadTime": "5",
"@tpidUsed": "5001",
"@matchedCurrency": "true",
"@matchedLocale": "true"
},
"HotelList": {
"@size": "1",
"@activePropertyCount": "235",
"HotelSummary": {
"@order": "0",
"@ubsScore": "1069912",
"hotelId": 206005,
"name": "Mediterranean Inn",
"address1": "425 Queen Anne Ave N",
"city": "Seattle",
"stateProvinceCode": "WA",
"postalCode": 98109,
"countryCode": "US",
"airportCode": "SEA",
"supplierType": "E",
"propertyCategory": 1,
"hotelRating": 3,
"confidenceRating": 70,
"amenityMask": 7799051,
"tripAdvisorRating": 4,
"tripAdvisorReviewCount": 1086,
"tripAdvisorRatingUrl": "http://www.tripadvisor.com/img/cdsi/img2/ratings/traveler/4.0-12345-4.gif",
"locationDescription": "Near Pacific Northwest Ballet",
"shortDescription": "<p><b>Property Location</b> <br />With a stay at Mediterranean Inn, you'll be centrally located in Seattle, steps from Key Arena and minutes from Seattle Children's Theatre. This family-friendly",
"highRate": 270,
"lowRate": 162,
"rateCurrencyCode": "USD",
"latitude": 47.62244,
"longitude": -122.35672,
"proximityDistance": 12.288694,
"proximityUnit": "MI",
"hotelInDestination": true,
"thumbNailUrl": "/hotels/1000000/900000/897600/897598/897598_108_t.jpg",
"deepLink": "http://www.travelnow.com/templates/55505/hotels/206005/overview?lang=en&currency=USD&standardCheckin=9/15/2015&standardCheckout=9/17/2015&roomsCount=1&rooms[0].adultsCount=2",
"RoomRateDetailsList": {
"RoomRateDetails": {
"roomTypeCode": 15567,
"rateCode": 15567,
"maxRoomOccupancy": 2,
"quotedRoomOccupancy": 2,
"minGuestAge": 0,
"roomDescription": "Petite Room, 1 Queen Bed, Kitchenette",
"propertyAvailable": true,
"propertyRestricted": false,
"expediaPropertyId": 897598,
"RateInfos": {
"@size": "1",
"RateInfo": {
"@priceBreakdown": "true",
"@promo": "true",
"@rateChange": "false",
"RoomGroup": {
"Room": {
"numberOfAdults": 2,
"numberOfChildren": 0,
"rateKey": "81423e04-b223-4ea1-807a-8812c13b31be",
"ChargeableNightlyRates": [
{
"@baseRate": "270.00",
"@rate": "162.00",
"@promo": "true"
}, {
"@baseRate": "270.00",
"@rate": "162.00",
"@promo": "true"
}
]
}
},
"ChargeableRateInfo": {
"@averageBaseRate": "270.00",
"@averageRate": "162.00",
"@commissionableUsdTotal": "324.00",
"@currencyCode": "USD",
"@maxNightlyRate": "162.00",
"@nightlyRateTotal": "324.00",
"@grossProfitOffline": "54.87",
"@grossProfitOnline": "81.40",
"@surchargeTotal": "69.07",
"@total": "393.07",
"NightlyRatesPerRoom": {
"@size": "2",
"NightlyRate": [
{
"@baseRate": "270.00",
"@rate": "162.00",
"@promo": "true"
}, {
"@baseRate": "270.00",
"@rate": "162.00",
"@promo": "true"
}
]
},
"Surcharges": {
"@size": "1",
"Surcharge": {
"@type": "TaxAndServiceFee",
"@amount": "69.07"
}
}
},
"nonRefundable": false,
"rateType": "MerchantStandard",
"promoId": 212134483,
"promoDescription": "24 hour deal: save 40%",
"promoType": "Standard",
"currentAllotment": 3
}
}
}
}
}
}
}
}
这是我的代码，我尝试映射这个JSON：
- (void)configureRestKit
{
// initialize AFNetworking HTTPClient
NSURL *baseURL = [NSURL URLWithString:@"http://api.ean.com"];
AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL];
// initialize RestKit
RKObjectManager *objectManager = [[RKObjectManager alloc] initWithHTTPClient:client];
// setup object mappings
RKObjectMapping *hotelMapping = [RKObjectMapping mappingForClass:[HotelList class]];
[hotelMapping addAttributeMappingsFromArray:@[@"name"]];
RKObjectMapping *priceMapping = [RKObjectMapping mappingForClass:[ChargeableRateInfo class]];
[priceMapping addAttributeMappingsFromDictionary:@{@"total": @"total"}];
[hotelMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"RoomRateDetailsList.RoomRateDetails.RateInfos.RateInfo.ChargeableRateInfo" toKeyPath:@"chargeableRateInfo" withMapping:priceMapping]];
// register mappings with the provider using a response descriptor
RKResponseDescriptor *responseDescriptor =
[RKResponseDescriptor responseDescriptorWithMapping:hotelMapping
method:RKRequestMethodGET
pathPattern:@"/ean-services/rs/hotel/v3/list"
keyPath:@"HotelListResponse.HotelList.HotelSummary"
statusCodes:[NSIndexSet indexSetWithIndex:200]];
[objectManager addResponseDescriptor:responseDescriptor];
}
有谁知道如何解决这个问题？感谢
答案 0 :(得分：0)
根据JSON中的内容，映射键应为@total。
然而，这并不理想，因为@是KKC中的一个特殊字符，RestKit会大量使用它。您需要使用this answer或this pull request中的内容解决此问题。