Core data destroyPersistentStore, not working for some

Hi all

I have a problem with core data, where when a new user login that is different from the previous user i delete all of core data by using "destroyPersistentStore".

Then i recreate the persistent store, this works when i am testing. When it does not work for one of my users when she test.

I am not sure why this should not work, i have added the code i use to destroy the persistent store below.

This code is run after login but before the view changes away from my login view.

        // Retrieves the shared `AppDelegate` instance
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
            return
        }
        appDelegate.destroyDataSyncBackground()
        // Get a reference to a NSPersistentStoreCoordinator
        let storeContainer =
        appDelegate.persistentContainer.persistentStoreCoordinator

        // Delete each existing persistent store
        for store in storeContainer.persistentStores {
            if let url = store.url {
                do {
                    try storeContainer.destroyPersistentStore(
                        at: url,
                        ofType: store.type,
                        options: nil
                    )
                } catch {
                    print("Failed to deleted all")
                }
            } else {
                print("Failed to deleted all")
            }
        }
        // Re-create the persistent container
        appDelegate.persistentContainer = NSPersistentContainer(
            name: "CueToCue" // the name of
            // a .xcdatamodeld file
        )

        // Calling loadPersistentStores will re-create the
        // persistent stores
        appDelegate.persistentContainer.loadPersistentStores {
            (store, error) in
            // Handle errors
            let description = NSPersistentStoreDescription()
            description.shouldMigrateStoreAutomatically = true
            description.shouldInferMappingModelAutomatically = true
            appDelegate.persistentContainer.persistentStoreDescriptions =  [description]
        }
        // Reapply context configuration
        let viewContext = appDelegate.persistentContainer.viewContext
        viewContext.automaticallyMergesChangesFromParent = true
        viewContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy
        do {
            try viewContext.save()
            appDelegate.recreateDataSyncBackground()
        } catch {
            print("Debug: saving delete all failed.")
        }
    }

The function "destroyDataSyncBackground" just set the my sync class to nil so stop any changes to core data while the code is running.

The function "recreateDataSyncBackground" recreate the sync class so fetch, post and patch requests is made again.