Mapping NSManagedObject Entity to custom class with RestKit - json

Question

I am able to pull JSON results and map them to the db. However, as soon as I try and map the entity to my subclass, it seems that my mapping breaks.
JSON Sample:
{"Customers":[{"Customer":{"Active":"Y","BranchID":0,"CustomerID":"SMCJIMB00736253","CustomerIdentifier":"","CustomerTypeID":0,"Name":""}}]}
Setup:
// Initialize RestKit
RKObjectManager* objectManager = [RKObjectManager objectManagerWithBaseURL:TEST_SERVICES_ROOT];
// Initialize object store
objectManager.objectStore = [RKManagedObjectStore objectStoreWithStoreFilename:RKDefaultSeedDatabaseFileName];
Mapping:
RKManagedObjectMapping* customerMapping = [RKManagedObjectMapping mappingForClass:[Customer class]];
customerMapping.primaryKeyAttribute = #"customerID";
[customerMapping mapKeyPathsToAttributes:#"Active", #"active", nil];
[customerMapping mapKeyPathsToAttributes:#"BranchID", #"branchID", nil];
[customerMapping mapKeyPathsToAttributes:#"CustomerID", #"customerID", nil];
[customerMapping mapKeyPathsToAttributes:#"CustomerIdentifier", #"customerIdentifier", nil];
[customerMapping mapKeyPathsToAttributes:#"CustomerTypeID", #"customerTypeID", nil];
[customerMapping mapKeyPathsToAttributes:#"Name", #"name", nil];
Add Mapping:
[objectManager.mappingProvider setMapping:customerMapping forKeyPath:#"Customers.Customer"];
Call WS:
// Load the object model via RestKit
RKObjectManager* objectManager = [RKObjectManager sharedManager];
NSString *url = [NSString stringWithFormat:SERVICE_CUSTOMERS,#"0",#"1",#"100"];
[objectManager loadObjectsAtResourcePath:url delegate:self block:^(RKObjectLoader* loader) {
loader.objectMapping = [objectManager.mappingProvider objectMappingForClass:[Customer class]];
}];
#interface Customer : NSManagedObject
#property (nonatomic, retain) NSString* active;
#property (nonatomic, retain) NSNumber* branchID;
#property (nonatomic, retain) NSString* customerID;
#property (nonatomic, retain) NSString* customerIdentifier;
#property (nonatomic, retain) NSNumber* customerTypeID;
#property (nonatomic, retain) NSString* name;
//populated via fetch predicate
#property (nonatomic, retain) NSArray* customerAddress;
#end
#implementation Customer
#dynamic active;
#dynamic branchID;
#dynamic customerID;
#dynamic customerIdentifier;
#dynamic customerTypeID;
#dynamic name;
//populated via fetch predicate
#dynamic customerAddress;
#end
This works fine as long as I don't try and map the Customer class to the Entity in the data model. Ultimately, I am trying to use my Customer class as a MKAnnotation, but I can't since I cant provide a concrete implementation class. I'm sure that there is some sort of misunderstanding of RestKit to blame. I see that the RKTwitterCoreData has the RKStatus as a concrete subclass.
#end

Answer 1

Ok,
I figured it out after much trial and error! The issue was that I needed to set my rootKeyPath on my mapping to match the rootkeyPath that I use when I added the mapping to the mapping provider. The RKTwitterCoreData client does not do this, but I needed to for whatever reason.
RKManagedObjectMapping* userMapping = [RKManagedObjectMapping mappingForClass:[User class]];
userMapping.rootKeyPath = #"User";
userMapping.primaryKeyAttribute = #"userName";
[userMapping mapKeyPathsToAttributes:#"Authenticated", #"authenticated", nil];
................
[objectManager.mappingProvider setMapping:userMapping forKeyPath:#"User"];