From bbce5abfd4b7dfc3f48db96114a400209a062dd5 Mon Sep 17 00:00:00 2001
From: Andrew Newdel <andrew.newdel@gmail.com>
Date: Thu, 21 Apr 2011 19:24:41 -0400
Subject: [PATCH] Use the keyPath property to map a subset of the response for
 a single target object.

---
 Code/ObjectMapping/RKObjectLoader.m |  2 +-
 Code/ObjectMapping/RKObjectMapper.h |  1 +
 Code/ObjectMapping/RKObjectMapper.m | 10 +++++++++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Code/ObjectMapping/RKObjectLoader.m b/Code/ObjectMapping/RKObjectLoader.m
index 5d00476d..0b60baf8 100644
--- a/Code/ObjectMapping/RKObjectLoader.m
+++ b/Code/ObjectMapping/RKObjectLoader.m
@@ -154,7 +154,7 @@
 	 */
 	NSArray* results = nil;
 	if (self.targetObject) {
-        [self.objectMapper mapObject:self.targetObject fromString:[response bodyAsString]];
+		[self.objectMapper mapObject:self.targetObject fromString:[response bodyAsString] keyPath:_keyPath];
         results = [NSArray arrayWithObject:self.targetObject];
 	} else {
 		id result = [self.objectMapper mapFromString:[response bodyAsString] toClass:self.objectClass keyPath:_keyPath];
diff --git a/Code/ObjectMapping/RKObjectMapper.h b/Code/ObjectMapping/RKObjectMapper.h
index 3b4c18e1..6db46c64 100644
--- a/Code/ObjectMapping/RKObjectMapper.h
+++ b/Code/ObjectMapping/RKObjectMapper.h
@@ -121,6 +121,7 @@ typedef enum {
  * provided
  */
 - (void)mapObject:(id)model fromString:(NSString*)string;
+- (void)mapObject:(id)model fromString:(NSString*)string keyPath:(NSString*)keyPath;
 
 ///////////////////////////////////////////////////////////////////////////////
 // Object Mapping API
diff --git a/Code/ObjectMapping/RKObjectMapper.m b/Code/ObjectMapping/RKObjectMapper.m
index 1f8c8c97..3c438392 100644
--- a/Code/ObjectMapping/RKObjectMapper.m
+++ b/Code/ObjectMapping/RKObjectMapper.m
@@ -163,8 +163,12 @@ static const NSString* kRKModelMapperRailsDateFormatString = @"MM/dd/yyyy";
 	return [self mapFromString:string toClass:nil keyPath:nil];
 }
 
-- (void)mapObject:(NSObject<RKObjectMappable>*)model fromString:(NSString*)string {
+- (void)mapObject:(NSObject<RKObjectMappable>*)model fromString:(NSString*)string keyPath:(NSString*)keyPath {
 	id object = [self parseString:string];
+	if (keyPath) {
+		object = [object valueForKeyPath:keyPath];
+	}
+	
 	if ([object isKindOfClass:[NSDictionary class]]) {
 		[self mapObject:model fromDictionary:object];
 	} else if (nil == object) {
@@ -176,6 +180,10 @@ static const NSString* kRKModelMapperRailsDateFormatString = @"MM/dd/yyyy";
 	}
 }
 
+- (void)mapObject:(NSObject<RKObjectMappable>*)model fromString:(NSString*)string {
+	[self mapObject:model fromString:string keyPath:nil];
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // Mapping from objects