RestKit Basic K-V Mapping - restkit-0.20

Question

I have a JSON payload that is being returned from my server and is structured like this:
{"users":[users]}
Using a simple RKObjectMapping and RKResponseDescriptor, I'm able to successfully map this JSON into a collection of User objects when I use getObjectsAtPath, but now I'd like to make a slight modification to the JSON server-side. Namely, I'd like to add a key-path
{"users":[users], "more":true}
where the key-path "more" indicates whether there are more users to load that are not included in the "users" array. The problem I'm having is that I can't find a simple way to access the value of this "more" key-path. Ideally, I'd like to define a Mapping and Response Descriptor that map "more" into a BOOL (or NSNumber), but I'm having trouble figuring out how to do this. Adding a mapping like
RKObjectMapping *moreMapping = [RKObjectMapping mappingForClass:[NSNumber class]]
with ResponseDescriptor
[RKResponseDescriptor responseDescriptorWithMapping:moreMapping pathPattern:pathPattern
keyPath:#"more" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
Doesn't do the trick. Ultimately, in the success block of getObjects, I'd like my RKMappingResult to be structured like so:
#{#"users":[users], #"more":1}
Any tips?

Answer 1

RestKit is based around mapping data into objects, not to objects in the way you're after. The closest you can get is to map the true into an NSNumber inside a dictionary or array. Try:
RKObjectMapping *moreMapping = [RKObjectMapping requestMapping];
[moreMapping addPropertyMapping:[RKAttributeMapping attributeMappingFromKeyPath:nil toKeyPath:#"more"]];