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  1. extension TestPeriods {
  2.  
  3. @nonobjc public class func fetchRequest() -> NSFetchRequest<TestPeriods> {
  4.     return NSFetchRequest<TestPeriods>(entityName: "TestPeriods")
  5. }
  6.  
  7. @NSManaged public var periods: [PeriodClass]?
  8.  
  9. }
  10.    
  11. public class PeriodClass: NSObject, NSCoding {
  12.  
  13.  
  14. var start: Date?
  15. var end: Date?
  16. var period: Int16?
  17.  
  18. public func encode(with aCoder: NSCoder) {
  19.     aCoder.encode(start, forKey: "start")
  20.     aCoder.encode(end, forKey: "end")
  21.     aCoder.encode(period, forKey: "period")
  22. }
  23.  
  24.  
  25. public required init?(coder aDecoder: NSCoder) {
  26.     start = aDecoder.decodeObject(forKey: "start") as! Date
  27.     end = aDecoder.decodeObject(forKey: "end") as! Date
  28.     period = aDecoder.decodeObject(forKey: "period") as! Int16
  29. }
  30.  
  31.  
  32. init(start: Date, end: Date, period: Int16) {
  33.     super.init()
  34.     self.start = start
  35.     self.end = end
  36.     self.period = period
  37. }
  38.  
  39. }
  40.    
  41. let container = TestPeriods(context: PersistenceServce.context)
  42. // The 'period' I refer to below is just an object with the same start, end, and period and I know is not nil
  43. let x = PeriodClass(start: period.start!, end: period.end!, period: period.period)
  44. container.periods?.append(x)
  45.  
  46. // Saving the object here
  47. PersistenceServce.saveContext()
  48. // I know this Persistence Service is not a problem as I use it for other Core Data Objects
  49.    
  50. let tFetch: NSFetchRequest<TestPeriods> = TestPeriods.fetchRequest()
  51.     do {
  52.         let classes = try PersistenceServce.context.fetch(tFetch)
  53.         print("TEST CLASS COUNT (classes.count)")
  54.         ...
  55.     }
  56.    
  57. print("TEST CLASS PERIODS (classes[0].periods)")
  58.    
  59. container.periods?.append(x)
  60.    
  61. container.periods = [x]
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