Retrived null in POST JSON RestKit - ios

Question

I have used RestKit and made a mapping with a managed object. I then use the postObject method but I have a problem when retrieved the body as it maps to null.
RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:baseURL];
// Serialize to JSON
objectManager.requestSerializationMIMEType = RKMIMETypeJSON;
[RKObjectManager setSharedManager:objectManager];
RKEntityMapping *searchInfoMapping = [RKEntityMapping mappingForEntityForName:NSStringFromClass([Search class]) inManagedObjectStore: objectManager.managedObjectStore];
searchInfoMapping.identificationAttributes = #[ #"faresQueryType" ];
[searchInfoMapping addAttributeMappingsFromDictionary:#{
#"id" : #"ID",
#"type" : #"Type",
#"count" : #"Count",
#"route” : #"route”,
}];
RKObjectMapping *searchInfoRequestMapping =[RKObjectMapping requestMapping];
[searchInfoRequestMapping addAttributeMappingsFromDictionary:#{
#"id" : #"ID",
#"type" : #"Type",
#"count" : #"Count",
#"route” : #"route”,
}];
//Data mapping is a method that returns an RKObjectMapping for my model
RKResponseDescriptor * searchDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:searchInfoMapping pathPattern:nil keyPath:nil statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptorsFromArray:#[searchDescriptor,]];
//Inverse mapping, to perform a POST
RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:searchInfoRequestMapping objectClass:[Search class] rootKeyPath:nil];
[objectManager addRequestDescriptor:requestDescriptor];
[appDelegate.objectManager postObject:nil path:#"routes" parameters:postParameters success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
NSLog(#"Success case %#",mappingResult);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"Failure in Flight Mapping %#",error);
[alert show];
}];
Edit
//JSON Result
{
"currency": {
"code": "USD",
"name": "U.S. Dollar",
"symbol": "US$",
"exchange_rate": 1
},
"routes": [
{
"id": "MS648-2022:MS985-2110",
"fares": [
{
"price": 745.32,
"description": "Economy",
"deeplink": "http://www.wego.com/flights/providers/2/deeplinks?search_id=CQtxCXQCRfmwhp72PAjopQ&trip_id=RUH:NYC:2013-12-20&fare_id=sky-tours.com:0&route=RUH-JFK",
"provider_code": "sky-tours.com",
"deeplink_params": {
"trip_id": "RUH:NYC:2013-12-20",
"route": "RUH-JFK",
"search_id": "CQtxCXQCRfmwhp72PAjopQ",
"fare_id": "sky-tours.com:0"
}
}
]
}
]
}

Answer 1

You need to supply the Search object instead of nil when you call postObject (currently you have postObject:nil). This tells RestKit which request mapping to use to send the request. As a result of not setting it the server will likely not have all of the required information (it's impossible to tell with the information provided).