Comments on: Core Data: Importing Data

By: Hwee-Boon Yar

Hwee-Boon Yar — Fri, 18 Dec 2009 05:11:00 +0000

You probably meant:

NSAssert([NSThread isMainThread], @”Not on the main thread”);

instead of:

NSAssert([NSThread mainThread], @”Not on the main thread”);

By: Bala Paranj

Bala Paranj — Tue, 07 Jul 2009 07:27:05 +0000

That does not answer my question: How can do a one-time import of that data?

By: Michele Longhi

Michele Longhi — Tue, 23 Jun 2009 11:35:48 +0000

Please forgive me: I wrote “marcus” instead of “Marcus”.
Best regards – Michele

By: Michele Longhi

Michele Longhi — Tue, 23 Jun 2009 11:28:14 +0000

Hi marcus

I just applied what I learned from your great article in a core data document-based application.
If the document (NSPersistentDocument) has been saved prior to call the import thread, everything work flawlessly. The problem arises with new documents: no stores are present into the coordinator, therefore calling the save method inside the working thread throws an exception. I tried to add an in-memory store to the NSPersistentStoreCoordinato and the changes are merged into the NSManagedObjectContext of the main thread, but nothing is saved with the document.
Any hint?

By: Satyam

Satyam — Sun, 21 Jun 2009 10:54:20 +0000

Bala, All the data will be stored in xml format by default. If you see your code, in the class “….AppDelegate.m” there will be a method “- (NSPersistentStoreCoordinator *) persistentStoreCoordinator “. You can see the name of “.xml file. It will be saved in the folder “/Users//Library/Application Support//.xml”

Default format of data will be xml. You can also configure it to work with SQLLite.
If you want to use SQLLite, change the following in above said method:

url = [NSURL fileURLWithPath: [applicationSupportFolder
stringByAppendingPathComponent: @".demodoc"]];

and

if ([coordinator addPersistentStoreWithType: NSSQLiteStoreType
configuration: nil
URL: url
options: nil
error: &error])

Similarly you can use binary store also.
(Didn’t use any html tags, so might need some formatting)