Releasing an NSManagedObjectContext
Releasing an NSManagedObjectContext
- Subject: Releasing an NSManagedObjectContext
- From: "Jim Thomason" <email@hidden>
- Date: Sun, 18 Mar 2007 18:34:23 -0500
I have a temporary NSManagedObjectContext, used for some migration,
and when I'm done using it, I want to release it. Standard stuff.
Unfortunately, my fetched NSManagedObjects still exist when I try to
release my context, and I sometimes get an exception:
2007-03-18 18:21:11.535 Debtinator[4711] An uncaught exception was raised
2007-03-18 18:21:11.541 Debtinator[4711] The NSManagedObject with
ID:0x382ff0 <x-coredata://2E18AFC3-F2C9-4A2E-9AA7-D46BA377FF3D/Frobnoz/p113>
has been invalidated.
2007-03-18 18:21:11.548 Debtinator[4711] *** Uncaught exception:
<NSObjectInaccessibleException> The NSManagedObject with ID:0x382ff0
<x-coredata://2E18AFC3-F2C9-4A2E-9AA7-D46BA377FF3D/Frobnoz/p113> has
been invalidated.
And it kills my app.
I seem to have had good luck by calling refreshObject:mergeChanges: on
all my registered objects when I'm done with the context, but I can't
truthfully say if that's really having an effect, or if it's just
coincidence. But, since I added those calls in, I only seem to crash
intermittently with the exception, instead of every single time.
Again, could just be coincidence.
So, I raise to you all....now what? What should I be looking for to
try and help isolate this issue? Is it a design flaw? Can I even
expect to do this with an NSManagedObjectContext, or do I need some
other approach/
I'd like to just release my objects when I'm done with them, but I'm
not retaining anything. I load up objects via fetchrequests or KVO
methods, but I don't retain anything. So how can I get rid of them?
The array from the fetch is autoreleased, and it's immutable, so I
can't go through and explicitly remove all the objects.
And I'm out of ideas. Any suggestions of how I can get rid of these
objects, or any other things I should be looking for in my managed
objects that could be causing this, I'd be greatly appreciative.
Thanks,
-Jim....
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