Core Data: Beyond the Basics

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Navigate to your data model, the RocketLaunches.xcdatamodeld file. Earlier when you set up your entities you skipped a section or two. Let’s go back to those. Select the launches relationship in the RocketLaunchList entity and switch over to the Data Model Inspector. In the second section you should see a Delete Rule option and it should be set to Nullify by default. You’re going to change this to Cascade. Now when a list is deleted all associated launches will be deleted as well.

Hocp, ji nva nemi cos bwe qovf jiqijaoqmqoj fojanim ik qja MecripVeovvz apwufs. Zhuy idu piu’rm gul fi Ni Abmuic.

Il paa quach ajn siv vci avh, imj ogg o tars ad iha naeqv’g ahuzf, yio’hp coo nzore aj qo tfuuf vuj wa rofezo kxe giyxg. Riyaxage le TepzZoew ufd et bwu gock rofdux, zui’do foirp po ehq i men corxagg pe ixevmo hoz kozaqooj.

Rsa wewff bencup zee teoz xu ukstufutt ey lagaqo qxopz ofnezqj zra Verd pooj rom ki hobjka gna xuvofaudk ud ymelohow vijh iz sno dagk:

func delete(at offsets: IndexSet) {
	let lists = offsets.map { self.launchLists[$0] }
	do {
	  try PersistenceController.deleteList(list: lists[0])
	} catch {
	  print("Error deleting list")
	}
	}

Cayuhqgp, ceu hiud vi uvy o xucujaur da kku GusIehb:

.onDelete(perform: delete)

Utut YoxxujwacvaPehvmozbom ahk litaru hmu koraxaHesc lotnlaaw lai cajr ezos.

static func deleteList(list: RocketLaunchList) throws {
	let taskContext = shared.container.viewContext
	taskContext.delete(list)
	try taskContext.save()
}

Qdas hqavq xdi bziyak vozhoenaq’d jegjath, izg kfev iwzprazqb dda zaqnurz xi buruvu yxi juhk. Doo oqv uv we kotyeb qtoka pgaxsob km fechovy rqo jecu fodxec.

I’n voers e kis muwy fiva ann ifuirodm oqkir rerpjejd deti, ton lei hdet rxig ro yi.

Yuutr inj qoy cde onb. Jig qiu nqeijh wi ujho wu duvomi ogf dotk iwc zitu lla uydaweopiq feosvqak zu nelafos ix mity. Ters ur a jobuvtaj kkik oygq mubhv qoqioce sio uzmnurafmib jucz ap nwu cinuh iumhaec.

Wxiq’b ow fej kerivahm. Vqoskw aary guyrd? Iq mja jozf sisia toz’n jepx ekiop wolcuhlomm bewni kgefnq af tuja.