gistfile1.m

- (void)zoodlesPurchaseDidFinish
{
    [self.cellBeingPurchased hideProcessingPayment];
    
    self.midTransaction = NO;
    [self.booksFetchController performFetch:nil];
    [self.tableView reloadData];
    [[ZOStore sharedStore] setDelegate:nil];

    // Invalidate the ZOReading's so a newly purchased book
    // will show up in the Playground books tab
    
    ZOEntityManager* readingManager = [[ZOEntityManager alloc]initWithModel:kZOReadingName kidId:nil];
    [readingManager invalidateInContext:self.defaultManagedObjectContext];
    [self.defaultManagedObjectContext save:nil];
}