RestKit 0.20 failed to fetch Entity

RestKit 0.20 failed to fetch Entity

I am using restkit 0.2 to perform a post request to a server. Here is the
setup code:
- (void)setupRestKit { //create RestKit object managers, one for API and
one fore OAuth due to being seperate endpoings. API Object manager is
default. RKObjectManager *apiObjectManager = [self
instantiateAPIObjectManager]; _oauthObjectManager = [self
instantiateOAuthObjectManager];
//create object store for core data persistence
RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc]
initWithManagedObjectModel:[NSManagedObjectModel
mergedModelFromBundles:nil]];
//provide store to object manager
_oauthObjectManager.managedObjectStore = managedObjectStore;
apiObjectManager.managedObjectStore = managedObjectStore;
//add default formatter for timestamp strings
NSTimeZone *UTC = [NSTimeZone timeZoneWithAbbreviation:@"UTC"];
[RKObjectMapping addDefaultDateFormatterForString:@"yyyy-MM-dd HH:mm:ss"
inTimeZone:UTC];
// Register mappings
[KaptureOAuthToken
registerEntityMappingWithObjectManager:self.oauthObjectManager];
[managedObjectStore createPersistentStoreCoordinator];
//create sqlite persistant store to cache data to disk
NSString *path = [RKApplicationDataDirectory()
stringByAppendingPathComponent:@"kapture.sqlite"];
NSError *error;
NSPersistentStore *persistentStore = [managedObjectStore
addSQLitePersistentStoreAtPath:path
fromSeedDatabaseAtPath:nil
withConfiguration:nil
options:@{
NSInferMappingModelAutomaticallyOption:
@YES,
NSMigratePersistentStoresAutomaticallyOption:
@YES
}
error:&error];
NSAssert(persistentStore, @"Failed to add persistent store with error:
%@", error);
//create in-memory cache so objects are not persisted more than once
managedObjectStore.managedObjectCache = [[RKInMemoryManagedObjectCache
alloc]
initWithManagedObjectContext:managedObjectStore.persistentStoreManagedObjectContext];
//create contexts for core data objects
[managedObjectStore createManagedObjectContexts];
}
(RKObjectManager *)instantiateAPIObjectManager { RKObjectManager
*objectManager = [RKObjectManager managerWithBaseURL:[NSURL
URLWithString:[Environment sharedInstance].apiBaseURL]];
//show network activity indicator when loading network resources
[AFNetworkActivityIndicatorManager sharedManager].enabled = YES;
//set api key as default http header for requests
[objectManager.HTTPClient setDefaultHeader:[Environment
sharedInstance].apiKey value:@"Api-Key"];
//set http header for device type (i.e. iPhone 4) and version of the app
NSString *deviceName = [NSString stringWithFormat:@"%@ %@", [[UIDevice
currentDevice] model], [[UIDevice currentDevice] systemVersion]];
NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
NSString *majorVersion = [infoDictionary
objectForKey:@"CFBundleShortVersionString"]; [objectManager.HTTPClient
setDefaultHeader:@"X-Requested-With" value:[NSString stringWithFormat:@"%@
- %@", deviceName, majorVersion]];
//set http header for api mime type [objectManager
setAcceptHeaderWithMIMEType:[Environment
sharedInstance].apiAcceptenceHeader];
objectManager.HTTPClient.allowsInvalidSSLCertificate = YES;
return objectManager; }
(RKObjectManager *)instantiateOAuthObjectManager { RKObjectManager
*objectManager = [RKObjectManager managerWithBaseURL:[NSURL
URLWithString:[Environment sharedInstance].apiOAuthBaseURL]];
//show network activity indicator when loading network resources
[AFNetworkActivityIndicatorManager sharedManager].enabled = YES;
objectManager.HTTPClient.allowsInvalidSSLCertificate = YES;
return objectManager; }
-(void)setupNetworkCaching { NSURLCache *URLCache = [[NSURLCache alloc]
initWithMemoryCapacity:4 * 1024 * 1024 diskCapacity:20 * 1024 * 1024
diskPath:nil]; [NSURLCache setSharedURLCache:URLCache]; }
And EntityMappings are configured via a category on NSManagedObject
subclass via these two methods
+ (void)registerEntityMappingWithObjectManager:(RKObjectManager
*)objectManager { RKResponseDescriptor *responseDescriptor;
responseDescriptor = [RKResponseDescriptor
responseDescriptorWithMapping:[self
entityMappingUsingStore:objectManager.managedObjectStore]
method:RKRequestMethodPOST
pathPattern:@"/"
keyPath:@""
statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[objectManager addResponseDescriptor:responseDescriptor];
}
(RKEntityMapping *)entityMappingUsingStore:(RKManagedObjectStore *)store {
RKEntityMapping *mapping = [RKEntityMapping
mappingForEntityForName:NSStringFromClass([KaptureOAuthToken class])
inManagedObjectStore:store];
NSDictionary *attributesDict = @{@"access_token": @"accessToken",
@"token_type": @"tokenType", @"expires": @"expirationDate", @"expires_in":
@"expiresIn", @"refresh_token": @"refreshToken"};
mapping.identificationAttributes = @[@"accessToken"];
[mapping addAttributeMappingsFromDictionary:attributesDict];
return mapping; }
My question is this: when I try to perform a POST request
[oauthObjectManager postObject:nil path:@"/" parameters:params
success:^(RKObjectRequestOperation *operation, RKMappingResult
*mappingResult) { dispatch_async(dispatch_get_main_queue(), ^(){
completion(YES, nil, mappingResult); }); }
failure:^(RKObjectRequestOperation *operation, NSError *error) {
dispatch_async(dispatch_get_main_queue(), ^(){ [self
notifyLoginError:error forNetwork:network]; }); }];
I get an expected response from the server and everything seems to go
through fine, but I get this error in the command line.

2013-08-22 17:29:11.949 Kapture[25335:1007] W
restkit.core_data.cache:RKEntityByAttributeCache.m:173 Failed to load
entity cache. Failed to execute fetch request: (entity: KaptureOAuthToken;
predicate: ((null)); sortDescriptors: ((null)); type:
NSDictionaryResultType; includesPendingChanges: NO; propertiesToFetch: ((
"(), name accessToken, isOptional 1, isTransient 0, entity
KaptureOAuthToken, renamingIdentifier accessToken, validation predicates
(\n), warnings (\n), versionHashModifier (null)\n userInfo {\n},
attributeType 700 , attributeValueClassName NSString, defaultValue
(null)", "(), name objectID, isOptional 1, isTransient 0, entity (null),
renamingIdentifier objectID, validation predicates (\n), warnings (\n),
versionHashModifier (null)\n userInfo {\n}" )); )
It seems that it cannot find the entity in the cache but I'm really not
sure. Any information is appreciated as always!