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PORestkit & CoreData Error. Failed to call designated initializer on NSManagedObject
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copied!<p>I am changing my app from using a purely remote DB to pulling the remote DB into a local DB. I am getting this Error when I am trying to get an Array of Objects from the remote database.</p> <p><code>CoreData: error: Failed to call designated initializer on NSManagedObject class 'Class'</code></p> <p>I am not sure what I am doing wrong. Here is my restkit setup.</p> <pre><code>RKObjectManager *manager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"http://fake.herokuapp.com"]]; NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"App" withExtension:@"momd"]; NSManagedObjectModel *managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL]; RKManagedObjectStore *managedObjectStore = [[RKManagedObjectStore alloc] initWithManagedObjectModel:managedObjectModel]; manager.managedObjectStore = managedObjectStore; RKEntityMapping *classMapping = [RKEntityMapping mappingForEntityForName:@"Class" inManagedObjectStore:managedObjectStore]; [classMapping addAttributeMappingsFromDictionary:[Class propertyMappings]]; NSIndexSet *statusCodes = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful); RKResponseDescriptor *classDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:classMapping pathPattern:@"/class.json" keyPath:@"" statusCodes:statusCodes]; [manager addResponseDescriptorsFromArray:@[classDescriptor]]; [managedObjectStore createManagedObjectContexts]; managedObjectStore.managedObjectCache = [[RKInMemoryManagedObjectCache alloc] initWithManagedObjectContext:managedObjectStore.persistentStoreManagedObjectContext]; [RKObjectManager setSharedManager:manager]; </code></pre> <p>And here is the request I am making, where it fails ( i think on the response).</p> <pre><code> [manager getObjectsAtPath:@"class.json" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult){ NSLog(@"Success"); }failure:^(RKObjectRequestOperation *operation, NSError *error) {}]; </code></pre> <p>If you need anything else just let me know. And if you could help out I will be a very happy developer.</p> <p>Thank you,</p> <p>-DO</p> <h2><strong>EDIT</strong></h2> <p>This is what propertMappings returns</p> <pre><code>+ (NSDictionary *) propertyMappings{return @{@"id" : @"iD", @"name" : @"name", @"image_url" : @"image_url"};} </code></pre>

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