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Editorial Team
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Asked: 2026-05-25T22:36:00+00:00

I have three classes, A, B and C. A is the main class. When

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I have three classes, A, B and C. A is the main class.

When the user wants to see the list of all objects that were purchased, Class B is called from A and shows the list of objects in a core data entity.

Inside class B, the user can buy new objects (in-app purchase). When the user wants to buy another object, class C is called.

When class C is called, a new object is created on the core data entity using

anObject = [NSEntityDescription insertNewObjectForEntityForName:@"Objects" inManagedObjectContext:context];

this object is then assigned to a local reference on Class C, using something like

self.object = anObject;

this object variable was declared like this:

.h
MyObjects *object;
@property (nonatomic, retain) MyObjects *object;

and @synthesized on .m

MyObjects is a core data class representing the entity.

In theory, object will retain anything assigned to it, so the line self.object = anObject I typed previously will retain anObject reference on self.object, right?

The problem is that when I try to access self.object in the same class after buying the new object, I receive an error “CoreData could not fulfill a fault for XXX”, where XXX is exactly self.object.

At no point in the code there’s any object removal from the database. The only operation to the database I could identify was a saving operation done by another class moments before the crash. The save is done by something like

if (![self.managedObjectContext save:&error]) ...

Is there any relation? what may be causing that?

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1 Answer

  1. Editorial Team

    CoreData manages the lifetime of managed objects and you should not retain and release them. If you want to keep a reference to the object so that it can be retrieved later then you have to store the object’s id (obtained using -[NSManagedObject objectID]). Then use that to retrieve the object later using -[NSManagedObjectContext objectWithID:].

    Make sure you understand about CoreData faulting. Read the documentation.

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