CoreData and Swift: contents gets swapped - swift

Question

I am new to swift and have a problem with CoreData: I can save and load to and from my CoreData store. But when I load the saved data from CoreData the data has been rearranged. I don't want this to happen. How do I solve this?
My code is this:
Meetings.swift
import Foundation
import CoreData
class Meetings: NSManagedObject {
#NSManaged var meetingTimeLeft: NSNumber
#NSManaged var title: String
#NSManaged var date: NSDate
#NSManaged var timeFrom: NSDate
#NSManaged var timeTo: NSDate
#NSManaged var timeFromActual: NSDate
#NSManaged var timeToActual: NSDate
#NSManaged var location: String
#NSManaged var locationRoom: String
#NSManaged var meetingGoals: String
#NSManaged var purpose: String
#NSManaged var averageHourlyCost: NSNumber
#NSManaged var completed: NSNumber
#NSManaged var durationActual: NSNumber
#NSManaged var durationPlanned: NSNumber
#NSManaged var persons: NSSet
#NSManaged var agendas: NSSet
#NSManaged var minutes: NSSet
#NSManaged var relationship: NSManagedObject
#NSManaged var startSetting: StartSetting?
}
extension Meetings {
func addPer(value: Person) {
self.mutableSetValueForKey("persons").addObject(value)
}
func removePer(value: Person) {
self.mutableSetValueForKey("persons").removeObject(Person)
//self.mutableSetValueForKey("persons").addObject(value)
}
func getPer() -> [Person] {
var persons: [Person]
persons = self.persons.allObjects as! [Person]
return persons
}
func addAgenda(value: AgendaItem) {
self.mutableSetValueForKey("agendas").addObject(value)
}
func removeAgenda(value: AgendaItem) {
self.mutableSetValueForKey("agendas").removeObject(AgendaItem)
//self.mutableSetValueForKey("persons").addObject(value)
}
func getAgenda() -> [AgendaItem] {
var agendas: [AgendaItem]
agendas = self.agendas.allObjects as! [AgendaItem]
return agendas
}
func getAgendaItem(i: Int) -> AgendaItem {
var agendas: [AgendaItem]
agendas = self.agendas.allObjects as! [AgendaItem]
let agendaItem = agendas[i]
return agendaItem
}
}
person.swift
import Foundation
import CoreData
class Person: NSManagedObject {
#NSManaged var name: String
#NSManaged var email: String
#NSManaged var phone: NSNumber
#NSManaged var title: String
#NSManaged var company: String
#NSManaged var photo: NSData
#NSManaged var meeting: Meetings
}
AgendaItem.swift
import Foundation
import CoreData
class AgendaItem: NSManagedObject {
#NSManaged var agendaItemTitle: String
#NSManaged var presenter: String
#NSManaged var durationPlanned: NSNumber
#NSManaged var durationActual: NSNumber
#NSManaged var filePresentation: NSData
#NSManaged var fileSupporting: NSData
#NSManaged var agendaTimeStart: NSDate
#NSManaged var meeting: Meetings
}
when saving i do like this:
internal var meetingsModels = [Meetings]()
public let managedObjectContext = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
managedObjectContext?.deleteObject(meetingsModels[meetingsIndexPassed.row]) meetingsModels.removeAtIndex(meetingsIndexPassed.row)
let entityDescription = NSEntityDescription.entityForName("Meetings", inManagedObjectContext: managedObjectContext!)
let entityDescription2 = NSEntityDescription.entityForName("Person", inManagedObjectContext: managedObjectContext!)
let entityDescription3 = NSEntityDescription.entityForName("AgendaItem", inManagedObjectContext: managedObjectContext!)
let meetings = Meetings(entity: entityDescription!, insertIntoManagedObjectContext: managedObjectContext)
meetings.title = meetingTitle_txt.text!
meetings.date = lDate
meetings.timeFrom = lStartTime
meetings.timeTo = lEndTime
meetings.location = address_txt.text!
meetings.purpose = details[0]
meetings.meetingGoals = details[1]
meetings.locationRoom = details[2]
meetings.durationPlanned = meetingsEditPassed.durationPlanned
meetings.completed = false
for var i = 0; i < personsEdit.count; i++ {
let person = Person(entity: entityDescription2!, insertIntoManagedObjectContext: managedObjectContext)
person.name = personsEdit[i].name
person.email = personsEdit[i].email
person.title = personsEdit[i].title
person.company = personsEdit[i].company
person.phone = personsEdit[i].phone
meetings.addPer(person)
}
for var i = 0; i < agendaEdit.count; i++ {
let agenda = AgendaItem(entity: entityDescription3!, insertIntoManagedObjectContext: managedObjectContext)
agenda.agendaItemTitle = agendaEdit[i].agendaItemTitle
//print(agendaEdit[i].agendaItemTitle)
agenda.presenter = agendaEdit[i].presenter
agenda.durationPlanned = agendaEdit[i].durationPlanned
meetings.addAgenda(agenda)
}
do {
try managedObjectContext?.save()
} catch let error1 as NSError {
print("\(error1)")
}
meetingsModels.append(meetings)
when loading i do this:
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
//1
let appDelegate =
UIApplication.sharedApplication().delegate as! AppDelegate
let managedContext = appDelegate.managedObjectContext!
//2
let fetchRequest = NSFetchRequest(entityName:"Meetings")
//fetchRequest.sortDescriptors = nil
//3
let fetchedResults: [Meetings]
do {
try
fetchedResults = (managedContext.executeFetchRequest(fetchRequest) as? [Meetings])!
if let results: [Meetings] = fetchedResults {
var temp = [Meetings]()
var temp2 = [Meetings]()
for tmp: Meetings in results {
temp.append(tmp)
if tmp.completed.boolValue {
temp2.append(tmp)
}else {
}
}
meetingsModels = temp
meetingsModels2 = temp2
} else {
}
} catch let error1 as NSError {
print("could not fetch meetings: \(error1), \(error1.userInfo)")
}
}
i hope that some of you can help me.

Answer 1

Your meetings data is being "rearranged" just because your Meetings don't belong to any ordered relationship. I'm not able to run your code on my side. However, I can recommend you one of the following:
Use ordered relations any time you want to make sure the order of
data is preserved any time you fetch it.
Use the
sortDescriptors property on your fetch requests. When you
create one, you can add a sort descriptor to it in order to
arrange data.