Easily duplicate CoreData objects with this universal category

NSManagedObject+Duplicate.h

//
//  NSManagedObject+Duplicate.h
//
//  Copyright (c) 2014 Barry Allard
//
//  MIT license
//
// inspiration: https://stackoverflow.com/questions/2998613/how-do-i-copy-or-move-an-nsmanagedobject-from-one-context-to-another 

#import <CoreData/CoreData.h>

@interface NSManagedObject (Duplicate)
// shallow copy of MOC ASSOCIATED object, does not update relationships
- (instancetype)duplicateAssociated;

// shallow copy of MOC UNASSOCIATED object, does not update relationships
- (instancetype)duplicateUnassociated;
@end

NSManagedObject+Duplicate.m

//
//  NSManagedObject+Duplicate.m
//
//  Copyright (c) 2014 Barry Allard
//
//  MIT license
//
// inspiration: https://stackoverflow.com/questions/2998613/how-do-i-copy-or-move-an-nsmanagedobject-from-one-context-to-another 

#import "NSManagedObject+Duplicate.h"

@implementation NSManagedObject (Duplicate)
- (void)duplicateToTarget:(NSManagedObject *)target
{
    NSEntityDescription *entityDescription = self.objectID.entity;
    NSArray *attributeKeys = entityDescription.attributesByName.allKeys;
    NSDictionary *attributeKeysAndValues = [self dictionaryWithValuesForKeys:attributeKeys];
    [target setValuesForKeysWithDictionary:attributeKeysAndValues];
}

- (instancetype)duplicateAssociated
{
    NSManagedObject *result = [NSEntityDescription
                               insertNewObjectForEntityForName:self.objectID.entity.name
                                        inManagedObjectContext:self.managedObjectContext];
    
    [self duplicateToTarget:result];
    return result;
}

- (instancetype)duplicateUnassociated
{
    NSManagedObject *result = [[NSManagedObject alloc]
                                               initWithEntity:self.entity
                               insertIntoManagedObjectContext:nil];
    [self duplicateToTarget:result];
    return result;
}
@end

NSManagedObject+Duplicate.podspec

Pod::Spec.new do |s|
  s.name            = 'NSManagedObject+Duplicate'
  s.version         = '0.0.1'
  s.license         = 'MIT'
  
  s.ios.deployment_target = '5.0'
  s.osx.deployment_target = '10.6'
 
  s.summary         = 'Easily duplicate CoreData objects with this universal category'
  s.homepage        = 'https://gist.github.com/steakknife/3bae589c4da8eba9b361'
  s.author          = { 'Barry Allard' => '[email protected]' }
  s.source          = { :git => 'https://gist.github.com/3bae589c4da8eba9b361.git' }
 
  s.source_files    = 'NSManagedObject+Duplicate.{h,m}'
  s.frameworks      = 'CoreData'
  s.requires_arc    = true
end