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iosobjective-cmultithreadingcore-datansmanagedobjectcontext

CoreData MultiThreading Delete

In my iPad application, I am using Multithreading to read data from my database and hence I am using different manged object contexts as explained Fred McCann's blog

The problem I am facing is while deleting items from the database. When I try to delete, I get the error that the managedObjectContext cannot delete another objectContext's data. How do I solve this problem?

It would be great is someone could help me out with this.

Solution

  • You need to pass the objectIds around and then get that object from the other context.

    NSManagedObject *object = // get the object...
NSManagedObjectID *objectID = object.objectID;
// Pass to other context on other thread...
// ...
NSManagedObject *sameObjectDifferentContext = [managedObjectContext objectWithID:objectID]