Swift: Trouble with NSFetchRequest using predicates in Core Data and iOS 17
I'm optimizing some code but I've hit a wall trying to I'm stuck on something that should probably be simple... I'm experiencing issues when trying to fetch specific objects from Core Data using `NSFetchRequest` with predicates in my iOS 17 app. I want to retrieve all users whose age is greater than 18, but the fetch request seems to return an empty array even when I know there are users that meet this criterion. Here's the code I'm using: ```swift let fetchRequest: NSFetchRequest<User> = User.fetchRequest() fetchRequest.predicate = NSPredicate(format: "age > %d", 18) let context = persistentContainer.viewContext context.perform { do { let results = try context.fetch(fetchRequest) print("Fetched users: \(results)") } catch let behavior as NSError { print("Could not fetch. \(behavior), \(behavior.userInfo)") } } ``` I've ensured that the `User` entity is set up correctly in the data model and that the `age` attribute is of type `Integer`. I also confirmed that the context is not nil and that the persistent container is set up properly. However, the output shows an empty array for `results`, and I don’t see any behavior messages being printed. To troubleshoot, I tried using a simpler predicate like `NSPredicate(format: "age != %d", 0)`, and it still returns an empty array. Additionally, I verified that there are indeed entries in the Core Data store that I can see in the debugger. I'm not sure what else to check. Any insights on what might be going wrong or what I might be overlooking? This is part of a larger application I'm building. Any examples would be super helpful. I'm on Linux using the latest version of Swift.