Eliminated the use of the ActiveRecord pattern across the library.

Code/CoreData/NSManagedObjectContext+RKAdditions.m

@@ -8,6 +8,8 @@
 
 #import <objc/runtime.h>
 #import "NSManagedObjectContext+RKAdditions.h"
+#import "NSEntityDescription+RKAdditions.h"
+#import "RKLog.h"
 
 static char NSManagedObject_RKManagedObjectStoreAssociatedKey;
 
@@ -23,4 +25,51 @@ static char NSManagedObject_RKManagedObjectStoreAssociatedKey;
     objc_setAssociatedObject(self, &NSManagedObject_RKManagedObjectStoreAssociatedKey, managedObjectStore, OBJC_ASSOCIATION_ASSIGN);
 }
 
+- (id)insertNewObjectForEntityForName:(NSString *)entityName
+{
+    return [NSEntityDescription insertNewObjectForEntityForName:entityName inManagedObjectContext:self];
+}
+
+- (NSUInteger)countForEntityForName:(NSString *)entityName predicate:(NSPredicate *)predicate error:(NSError **)error
+{
+    NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:entityName];
+    fetchRequest.predicate = predicate;
+    return [self countForFetchRequest:fetchRequest error:error];
+}
+
+- (id)fetchObjectForEntity:(NSEntityDescription *)entity withValueForPrimaryKeyAttribute:(id)primaryKeyValue
+{
+    NSPredicate *predicate = [entity predicateForPrimaryKeyAttributeWithValue:primaryKeyValue];
+    if (! predicate) {
+        RKLogWarning(@"Attempt to fetchObjectForEntity for entity with nil primaryKeyAttribute. Set the primaryKeyAttributeName and try again! %@", self);
+        return nil;
+    }
+
+    NSFetchRequest *fetchRequest = [[NSFetchRequest new] autorelease];
+    fetchRequest.entity = entity;
+    fetchRequest.predicate = predicate;
+    fetchRequest.fetchLimit = 1;
+    __block NSError *error;
+    __block NSArray *objects;
+    [self performBlockAndWait:^{
+        objects = [self executeFetchRequest:fetchRequest error:&error];
+    }];
+    if (! objects) {
+        RKLogCoreDataError(error);
+        return nil;
+    }
+
+    if ([objects count] == 1) {
+        return objects[0];
+    }
+
+    return nil;
+}
+
+- (id)fetchObjectForEntityForName:(NSString *)entityName withValueForPrimaryKeyAttribute:(id)primaryKeyValue
+{
+    NSEntityDescription *entity = [NSEntityDescription entityForName:entityName inManagedObjectContext:self];
+    return [self fetchObjectForEntity:entity withValueForPrimaryKeyAttribute:primaryKeyValue];
+}
+
 @end