Add support for mapping to NSData attributes using a NSKeyedArchiver. closes #910

Code/ObjectMapping/RKMappingOperation.m

@@ -115,7 +115,9 @@ static BOOL RKIsManagedObject(id object)
     RKLogTrace(@"Found transformable value at keyPath '%@'. Transforming from type '%@' to '%@'", keyPath, NSStringFromClass([value class]), NSStringFromClass(destinationType));
     Class sourceType = [value class];
 
-    if ([sourceType isSubclassOfClass:[NSString class]]) {
+    if ([destinationType isSubclassOfClass:[NSData class]]) {
+        return [NSKeyedArchiver archivedDataWithRootObject:value];
+    } else if ([sourceType isSubclassOfClass:[NSString class]]) {
         if ([destinationType isSubclassOfClass:[NSDate class]]) {
             // String -> Date
             return [self parseDateFromString:(NSString *)value];

Tests/Logic/ObjectMapping/RKObjectMappingNextGenTest.m

@@ -1269,6 +1269,24 @@
     assertThat(user.name, is(equalTo(@"Blake Watters")));
 }
 
+- (void)testMappingToAnNSDataAttributeUsingKeyedArchiver
+{
+    RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[RKTestUser class]];
+    RKAttributeMapping *attributeMapping = [RKAttributeMapping attributeMappingFromKeyPath:@"arrayOfStrings" toKeyPath:@"data"];
+    [mapping addPropertyMapping:attributeMapping];
+    
+    NSDictionary *dictionary = @{ @"arrayOfStrings": @[ @"one", @"two", @"three" ] };
+    RKTestUser *user = [RKTestUser user];
+    RKMappingOperation *operation = [[RKMappingOperation alloc] initWithSourceObject:dictionary destinationObject:user mapping:mapping];
+    NSError *error = nil;
+    BOOL success = [operation performMapping:&error];
+    expect(success).to.equal(YES);
+    expect(user.data).notTo.beNil();
+    NSDictionary *decodedDictionary = [NSKeyedUnarchiver unarchiveObjectWithData:user.data];
+    NSArray *expectedValue = @[ @"one", @"two", @"three" ];
+    expect(decodedDictionary).to.equal(expectedValue);
+}
+
 #pragma mark - Relationship Mapping
 
 - (void)testShouldMapANestedObject

Tests/Models/RKTestUser.h

@@ -9,23 +9,7 @@
 #import <Foundation/Foundation.h>
 #import "RKTestAddress.h"
 
-@interface RKTestUser : NSObject {
-    NSNumber *_userID;
-    NSString *_name;
-    NSDate *_birthDate;
-    NSArray *_favoriteColors;
-    NSDictionary *_addressDictionary;
-    NSURL *_website;
-    NSNumber *_isDeveloper;
-    NSNumber *_luckyNumber;
-    NSDecimalNumber *_weight;
-    NSArray *_interests;
-    NSString *_country;
-
-    // Relationships
-    RKTestAddress *_address;
-    NSArray *_friends;
-}
+@interface RKTestUser : NSObject
 
 @property (nonatomic, strong) NSNumber *userID;
 @property (nonatomic, strong) NSString *name;
@@ -43,6 +27,7 @@
 @property (nonatomic, strong) NSArray *friends;
 @property (nonatomic, strong) NSSet *friendsSet;
 @property (nonatomic, strong) NSOrderedSet *friendsOrderedSet;
+@property (nonatomic, strong) NSData *data;
 
 + (RKTestUser *)user;
 

Tests/Models/RKTestUser.m

@@ -11,23 +11,6 @@
 
 @implementation RKTestUser
 
-@synthesize userID = _userID;
-@synthesize name = _name;
-@synthesize birthDate = _birthDate;
-@synthesize favoriteDate = _favoriteDate;
-@synthesize favoriteColors = _favoriteColors;
-@synthesize addressDictionary = _addressDictionary;
-@synthesize website = _website;
-@synthesize isDeveloper = _isDeveloper;
-@synthesize luckyNumber = _luckyNumber;
-@synthesize weight = _weight;
-@synthesize interests = _interests;
-@synthesize country = _country;
-@synthesize address = _address;
-@synthesize friends = _friends;
-@synthesize friendsSet = _friendsSet;
-@synthesize friendsOrderedSet = _friendsOrderedSet;
-
 + (RKTestUser *)user
 {
     return [self new];