Fruits.swift

@MainActor final class ViewModel: ObservableObject {
  private let list: FetchedResultList<Fruit>
        
  init(context: NSManagedObjectContext = PersistenceController.shared.container.viewContext) {
    list = FetchedResultList(context: context,
                             sortDescriptors: [
                               NSSortDescriptor(keyPath: \Fruit.name, ascending: true)
                             ])
    list.willChange = { [weak self] in self?.objectWillChange.send() }
  }

  var fruits: [Fruit] {
    list.items
  }
  
  @Published var searchText: String = "" {
    didSet {
      if searchText.isEmpty {
        list.predicate = nil
      }
      else {
        list.predicate = NSPredicate(format: "name contains[cd] %@", searchText)
      }
    }
  }
}