How to use Restkit mapping - restkit

Question

I am using the development branch to avoid starting with the old as the new is rolling out. Unfortunately, I cannot figure out how to do the basics (I am new to RestKit).
The basic steps I am trying are to accomplish start with calling "/auth/login/" with 2 parameters and retrieve a json document back. Any help would be greatly appreciated!
UPDATE 1: am I asking the wrong question? what am I missing? do people just no use Restkit for projects?
UPDATE 2: what should I look for when getting this error? I have a class mapping and a path pattern, but I really don't get what I should be doing.
Code=1001 "Unable to find any mappings for the given content"
I just found this updated readme file at https://github.com/RestKit/RestKit/blob/development/README.md
UPDATE 3: I have tried a variety of ways to do a simple call/respond/success call but nothing. I can see in the output the call is successful, but RestKit always complains it cannot map the content. I really do not get it. The resulting json is mostly as follows:
{
"email" : "me#here.com",
"fullname" : "Full Name"
}
and no matter what I try, I cannot get RestKit to figure that out. Help? Anyone?
UPDATE 4: I changed the payload to be the following, plus I changed the descriptor statement, but there was no change in results. The call succeeds, RestKit fails for error 1001. It still says my keyPath=null. What am I missing?
{
"whoami" : {
"email" : "me#here.com",
"fullname" : "Full Name"
}
}
[manager addResponseDescriptor:[RKResponseDescriptor responseDescriptorWithMapping:mymap
pathPattern:#"/auth/login/"
keyPath:#"whoami"
statusCodes:statusCodes]];

Answer 1

Maybe this can help..the request may look like this:
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
[params setObject:email forKey:#"email"];
[params setObject:fullname forKey:#"fullname"];
NSMutableURLRequest *rq = [manager requestWithObject:[User new] method:RKRequestMethodPOST path:#"http://url" parameters:params];
RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:[User mapping] pathPattern:nil keyPath:nil statusCodes:nil];
RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:rq responseDescriptors:#[responseDescriptor]];
[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *result) {
//success
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
//error
}];
[operation start];
and mapping:
+ (RKObjectMapping *)mapping
{
RKObjectMapping *requestMapping = [RKObjectMapping mappingForClass:[self class]];
[requestMapping addAttributeMappingsFromDictionary:#{
#"ContactDetail": #"contactDetail",
#"IdUser": #"idUser",
#"Name": #"name",
#"Address": #"address",
#"UserSettings": #"userSettings"
}];
// if the obj have relationship
RKRelationshipMapping *rl = [RKRelationshipMapping relationshipMappingFromKeyPath:#"someKey" toKeyPath:#"toKey" withMapping:[Obj mapping]];
[requestMapping addPropertyMappingsFromArray:#[rl]];
return requestMapping;
}