Open Radar

 
07-Jan-2013 05:18 PM Michael Herring:
Summary:
The attached NSPersistentDocument-based app will create an entity, and attempt to obtain a permanent ID for it. This fails when the document is newly-created, because an autosave hasn't yet happened (and thus, there are no persistent stores via which a permanent ID can be made).

Uncomment lines 56 and 57 in CDDocument.m and it works. Since there is a persistent store (even an in-memory one), the permanent IDs are generated. The problem seems to be that Core Data will not implicitly create a persistent store when permanent IDs are requested, leading to a failure.

Steps to Reproduce:
 - Build and run the attached app on OS X 10.8.
 - Create a new document.
 - Click "do both."

Expected Results:
The output should illustrate the creation of a new object, followed by information about its newly-permanent ID.

Actual Results:
An error message is logged, citing problems with persistent stores.

Regression:
Unknown.

Notes:
The test case does not exhibit the issue if an autosave is "induced"; that is, click "Create NSManagedObject," then switch to another application, then switch back, and click "Obtain Permanent ID." Be sure you're reproducing with a new document in the test app, without switching apps.

07-Jan-2013 05:18 PM Michael Herring:
'PermanentOID.zip' was successfully uploaded