Converting ObjectID from a string?

Question

How do I reverse this :

NSURL *uriID = [[obj objectID] URIRepresentation];
NSString *stringID = [uriID absoluteString];

to get back to objectID

score 1 · Accepted Answer · answered Apr 09 '15 at 08:37

1

You can use persistent store coordinator.

NSURL *uriId = ...;
NSPersistentStoreCoordinator *coordinator = ...;
NSManagedObjectID *objectId =  [coordinator managedObjectIDForURIRepresentation:urlId];

answered Apr 09 '15 at 08:37

DV_

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3
5

Thanks, you put me on the right track. Note to self : get coordinator : NSManagedObjectID *objectId = [self.managedObjectContext.persistentStoreCoordinator managedObjectIDForURIRepresentation:[NSURL URLWithString:identifier]]; and keep in mind that you have to persist object before you get the objectID : [core-data error 133000](http://stackoverflow.com/questions/8637444/core-data-existingobjectwithiderror-causes-error-133000) – dataphile Apr 09 '15 at 09:18

Converting ObjectID from a string?

1 Answers1