I'm trying to remove a managed object context, but instead of removing the object itself it sets all instant variables to null. Am I doing anything wrong while deleting an instant of NSManagedObjec...

I'm trying to create a NSManagedObjectContext object. They error reads as follows: Expected specifier-qualifier-list before 'NSManagedObjectContext' and here is my header file: #import <U...

In core data for the iPhone, I was getting all sorts of errors trying to save data to a NSManagedObjectContext. I believe that my issues were all to do with me using a NSManagedObjectContext that ...

I have this code: NSEntityDescription *userEntity = [[[engine managedObjectModel] entitiesByName] objectForKey:@"User"]; User *user = [[User alloc] initWithEntity:userEntity insertIntoManagedObjec...

after I insert a ManagedObject into a context I'd like to fetch it later but before saving the context (I'd save after all objects are inserted). It appears that querying the context later with a f...

I don't understand the output of NSLog for the array returned by a NSFetchRequest. I'm reading my database and placing the contents in an array, looping through the array and then outputting the ...

Is it possible to model relationships between entities that are defined in separate NSManagedObjectModels if the entities are always used within an NSManagedObjectModel that is created by merging t...