RestKit 0.20 nested Object mapping (path to object tree different) - ios

Question

I got a problem with mapping a nested object value.
I got two objects with the following properties:
a)
class Input
#property NSString value;
#property NSString title;
b)
class Profile
#property Input myAwesomeInput;
..so a Profile contains an Input object. When I mapp the objects with RestKit (0.20) I get sth. like this:
{ myAwesomeInput_test:{"value":"xyz","title":"a title"}}
What I wanna achieve is:
{myAwesomeInput_test:"xyz"}
So I don't want to map "Input" but just the Input.value. Is that even possible?
At the moment my code looks like this:
RKObjectMapping* inputMapping = [RKObjectMapping requestMapping];
[inputMapping addAttributeMappingsFromArray:#[#"value"]];
RKRequestDescriptor *reqDescInput = [RKRequestDescriptor requestDescriptorWithMapping:inputMapping objectClass:[Input class] rootKeyPath:nil];
RKObjectMapping* searchProfile = [RKObjectMapping requestMapping];
RKRequestDescriptor *reqDescSearchProfile = [RKRequestDescriptor requestDescriptorWithMapping:searchProfile objectClass:[SearchProfile class] rootKeyPath:nil];
[searchProfile addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"myAwesomeInput" toKeyPath:#"myAwesomeInput_test" withMapping:inputMapping]];
EDIT: (solved)
Ok I solved it. Hope it's the way people should do it. You can directly address from within the dictionary.
RKObjectMapping* searchProfile = [RKObjectMapping requestMapping];
[aeSearchProfile addAttributeMappingsFromDictionary:#{
#"myAwesomeInput.value": #"myAwesomeInput_test"
}];
RKRequestDescriptor *reqDescSearchProfile = [RKRequestDescriptor requestDescriptorWithMapping:searchProfile objectClass:[SearchProfile class] rootKeyPath:nil];

Answer 1

Use keypaths rather than multiple mappings.
Try this:
RKObjectMapping* searchProfile = [RKObjectMapping requestMapping];
[searchProfile addAttributeMappingsFromDictionary:#{ #"myAwesomeInput.value" : #"myAwesomeInput_test" }];
RKRequestDescriptor *reqDescSearchProfile = [RKRequestDescriptor requestDescriptorWithMapping:searchProfile objectClass:[SearchProfile class] rootKeyPath:nil];