RestKit 0.20 POST JSON with nested array - restkit

Question

I have an object called Client which looks something like this.
#interface Client : NSManagedObject
#property (nonatomic, retain) NSString * firstName;
#property (nonatomic, retain) NSString * middleName;
#property (nonatomic, retain) NSString * lastName;
#property (nonatomic, retain) Styles *clientStyles;
#end
Styles is a nested object underneath Client. It's a One to One relationship. When this comes down from the server in JSON it looks like this.
{
"firstName": "",
"middleName": "",
"lastName": "",
"firstStyle": {
"styleId": 4,
"name": "",
"description": "",
"stylingTime": "55 min",
"stylingProductUsage": "A lot",
"chemicals": "LOTS O'GEL",
"deleted": false,
"modifiedOn": 1357161168830
}
}
Everything is in a nice single object. I can pull this down and map it to my object no problem. The issue comes in when I need to return this back to the server. It needs to be in this format.
{
"firstName": "",
"middleName": "",
"lastName": "",
"styles": [
{
"styleId": 4,
"name": "",
"description": "",
"stylingTime": "55 min",
"stylingProductUsage": "A lot",
"chemicals": "LOTS O'GEL",
"deleted": false,
"modifiedOn": 1357161168830
}]
}
Which is very problematic because the return mapping has the styles entity sitting inside an array, rather then being a one-to-one. So far I have got this as my RKRequestDescriptor
RKObjectMapping *requestMapping = [RKObjectMapping requestMapping];
[requestMapping addAttributeMappingsFromDictionary:#{
#"firstName": #"firstName",
#"middleName": #"middleName",
#"lastName": #"lastName",
}];
RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:requestMapping
objectClass:[Client class]
rootKeyPath:nil];
How the HECK do I create the mapping so it will return an array of Style objects with one value???

Answer 1

Wild guess, but the mappings are pretty smart, can't you do something like:
RKObjectMapping *requestMapping = [RKObjectMapping requestMapping];
[requestMapping addAttributeMappingsFromDictionary:#{
#"firstName": #"firstName",
#"middleName": #"middleName",
#"lastName": #"lastName",
}];
RKObjectMapping *stylesMappingDescription = [RKObjectMapping requestMapping];
[requestMapping addAttributeMappingsFromDictionary:#{
#"properties": #"here"
}];
[requestMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:#"styles.0" toKeyPath:#"styles" withMapping:stylesMappingDescription]];
RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:requestMapping
objectClass:[Client class]
rootKeyPath:nil];
(note the styles.0 as fromKeyPath)