import UIKit
import CoreData

class TodoModel: NSObject {

    var todoList : [Todo]!
    var doneList : [Todo]!

    // 중략

    override init() {
        super.init()

        let todoFetch = NSFetchRequest(entityName: "Todo")
        todoFetch.sortDescriptors = [NSSortDescriptor(key: "creation", ascending: true)]

        do {
            todoFetch.predicate = NSPredicate(format: "done == %@", NSNumber(bool: false))
            todoList = try self.managedObjectContext().executeFetchRequest(todoFetch) as! [Todo]

            todoFetch.predicate = NSPredicate(format: "done == %@", NSNumber(bool: true))
            doneList = try self.managedObjectContext().executeFetchRequest(todoFetch) as! [Todo]

        } catch {
            fatalError("Failed to fetch Todo: \(error)")
        }
    }
}