POSTing large objects as JSON using RestKit - ios

Question

Is there a way to POST large NSObject-derived object structures without having to manually specify every property and property collection to RestKit?
Here is a simple example, with a single class DABUser But imagine it contained properties which were also objects, collections, and those had more of the same to represent some larger object tree.
The class to POST:
#interface DABUser : NSObject
#property (nonatomic) int age;
#property (copy, nonatomic) NSString *name;
#end
POST a DABUser object:
RKObjectMapping *userMapping = [RKObjectMapping requestMapping];
[userMapping addAttributeMappingsFromArray:#[ #"age", #"name"]];
RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:userMapping objectClass:[DABUser class] rootKeyPath:nil method:RKRequestMethodPOST];
RKObjectManager *objectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:#"http://localhost:3000"]];
objectManager.requestSerializationMIMEType = RKMIMETypeJSON;
[objectManager addRequestDescriptor:requestDescriptor];
DABUser *user = [[DABUser alloc] init];
user.age = 20;
user.name = #"Charlie Brown";
[objectManager postObject:user path:#"users/123" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
NSLog(#"Success!");
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
NSLog(#"Failed!");
}];
The JSON generated from the above code being and sent via the request body is:
{ "age":20,"name":"Charlie Brown" }
When I have a large object tree, defining the property mappings can get tiresome (and error-prone), with many lines of similar code to this example's:
RKObjectMapping *userMapping = [RKObjectMapping requestMapping];
[userMapping addAttributeMappingsFromArray:#[ #"age", #"name"]];
Is there a way that I could just get RestKit to generate the JSON from the objects, without all this setup?

Answer 1

"When I have a large object tree, defining the property mappings can get tiresome (and error-prone), with many lines of similar code to this example's:"
I personally think this is the easiest way and a good approach.I have done object mapping to large objects with so many object mapping and multiple object linking and found this is the easiest way to deal with it correctly