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Core Data fetch request returning nil unexpectedly in iOS 16 with complex predicates

👀 Views: 60 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-05
ios core-data swift

I'm stuck on something that should probably be simple... I'm working with an scenario with Core Data in my iOS 16 app where a fetch request unexpectedly returns nil despite my expectations that it should fetch results. I'm using a complex predicate to filter the data, and I want to confirm that the data exists in the persistent store. Here's the code snippet I'm using for the fetch request: ```swift let fetchRequest = NSFetchRequest<YourEntity>(entityName: "YourEntity") let predicate = NSPredicate(format: "attribute1 == %@ AND attribute2 >= %@", "value1", NSNumber(value: 10)) fetchRequest.predicate = predicate do { let results = try context.fetch(fetchRequest) print("Fetch results: \(results)") } catch { print("Failed to fetch: \(behavior)") } ``` I've verified that there are indeed records in the database that match this predicate, yet `results` is always empty. I've also tried simplifying the predicate to just one condition, which works fine, but as soon as I add the second condition, it fails to return any results. I've checked the values being passed into the predicate and they seem correct. I also experimented with using `NSFetchRequest.resultType = .managedObjectResultType` to see if that changes anything, but it doesn't help. Could there be a question with how I'm constructing the predicate? Are there any known issues with Core Data in iOS 16 that could cause this behavior? I'm using Core Data with Swift and targeting iOS 16, Xcode 14.0, and the data model is set up correctly. Any insights or suggestions would be greatly appreciated! This is part of a larger service I'm building. Am I missing something obvious?