Undoing Core Data insertions that are performed off the main thread

Question

I\'m working on some code that uses an NSOperation to import data. I\'d like for the user to be able to undo the NSManagedObject instances that are cre

Answer 1

It's incredibly likely you've considered this and you're likely only looking for a solution using the existing undoManager, but just in case:

Since you're inserting objects and not updating existing ones, you do have the power to tag them with a transaction id as each batch is imported, deleting them in a background thread in the case of an undo. A simple incremented NSNumber is sufficient for the tag.

Inelegant, but workable.