Here's how to dynamically set the predicates for your fetch request. First, the properties I have in my SwiftUI view: @FetchRequest( sortDescriptors: [NSSortDescriptor(keyPath: \Pokemon.id, ascending: true)], animation: .default ) private var pokedex: FetchedResults<Pokemon> @State var searchText = "" @State var filterByFavorites = false var compoundPredicate: NSPredicate { var predicates: [NSPredicate] = [] // Add search predicate if !searchText.isEmpty { predicates.append(NSPredicate(format: "name contains[c] %@", searchText)) } // Add favorite filter predicate if filterByFavorites { predicates.append(NSPredicate(format: "favorite == %d", true)) } // Combine predicates return NSCompoundPredicate(andPredicateWithSubpredicates: predicates) } Notice I don't set any predicate in the fetch request at this point. Also notice, the part that makes this all work is the compoundPredicate computed property. I start with an empty predicates array, then I check my searchText and append the appropriate predicate if the condition is true. Then I check my filterByFavorites property and do the same. Alright, now the code inside the body var that makes it work. I won't post my whole view since most of it is irrelevant, but here is where I add my List view which shows my pokedex fetched results: List(pokedex.filter { compoundPredicate.evaluate(with: $0) }) { pokemon in I filter my pokedex fetched results with the compoundPredicate and evaluate every single pokemon in the list to make sure only those that match the criteria are shown. I also have a .searchable(text: $searchText, prompt: "Find a Pokemon") modifier on the List view to manage the searching part. And then I have a button the user can tap to toggle filterByFavorites between true and false.

Ok, I finally decided to just go with the App Group, but now I am getting an error in my preview container. This code: struct PersistenceController { ... static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext let samplePokemon = Pokemon(context: viewContext) samplePokemon.id = 1 samplePokemon.name = "bulbasaur" samplePokemon.types = ["grass", "poison"] samplePokemon.hp = 45 samplePokemon.attack = 49 samplePokemon.defense = 49 samplePokemon.specialAttack = 65 samplePokemon.specialDefense = 65 samplePokemon.speed = 45 samplePokemon.sprite = URL(string: "https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/1.png") samplePokemon.shiny = URL(string: "https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/shiny/1.png") samplePokemon.favorite = false do { try viewContext.save() } catch { let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() ... } From my PersistenceController catches an error on the try viewContext.save() line when I try to run my widget, but it still works fine when running my app. Here's my new app group shared container code in the same PersistenceController: init(inMemory: Bool = false) {     let sharedStoreURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.myApGroup")!.appending(path: "Poke.sqlite")     let description = NSPersistentStoreDescription(url: sharedStoreURL)           container = NSPersistentContainer(name: "Poke")     if inMemory {       container.persistentStoreDescriptions = [description]     }     container.loadPersistentStores(completionHandler: { (storeDescription, error) in       if let error = error as NSError? {         fatalError("Unresolved error \(error), \(error.userInfo)")       }     })     container.viewContext.automaticallyMergesChangesFromParent = true } The error is not here, but again in my static var preview area when I try to save the viewContext. Here's my console: Any help with this would be much appreciated.

@deeje Obviously that's the solution if I can't get it to work the same way it did in beta 3, but I'd rather not do the extra work of creating an app group if I don't need it.