Re: Managed Object Model versions
Re: Managed Object Model versions
- Subject: Re: Managed Object Model versions
- From: Luke Sneeringer <email@hidden>
- Date: Fri, 30 Sep 2011 15:36:58 -0500
Nevermind, what you said sparked a light bulb. I'm looking at the code in my app delegate now. I think I'm on the right track.
Thanks for your help!
Regards,
Luke
On September 30, 2011, at 15:31 , Luke Sneeringer wrote:
> Hmm. I never did that...but perhaps that's my problem?
>
> My code looks like...
>
> MyAppDelegate* delegate = [[NSApplication sharedApplication] delegate];
> NSManagedObjectContext* db = [delegate managedObjectContext];
> NSEntityDescription* entity = [NSEntityDescription entityForName: @"MyObject" inManagedObjectContext: db];
> MyObject* object = [[MyObject alloc] initWithEntity: entity insertIntoManagedObjectContext: db];
>
> Am I missing something? I want to learn. :)
>
> Regards,
> Luke Sneeringer
>
> On September 30, 2011, at 7:11 , Heath Borders wrote:
>
>> You specify a URL for the persistent store when you create it. Just find the store at that URL.
>>
>> -Heath
>>
>> On Sep 30, 2011 12:33 AM, "Luke Sneeringer" <email@hidden> wrote:
>> > Hey all,
>> > I am working on writing my first Core Data application. I made an entity, did some work to test it, and then made another (linked) entity.
>> > The problem is now I'm totally stuck, because when I try to do anything that affects Core Data, I get a completely unhelpful error message:
>> >
>> > "The managed object model version used to open the persistent store is incompatible with the one that was used to create the persistent store."
>> >
>> > Well, I Googled this, and there's some discussion about making migrations. I don't want to do that. I just want to blow away the old data store -- get it out of the filesystem and have the application make a new one.
>> > However, I can't figure out how to do this. I found a blog entry suggesting that I look in ~/Library/Application Support/Application Name/, but my application doesn't seem to have made a folder in ~/Library/Application Support/ at all.
>> >
>> > So...how can I get rid of my old persistent store? It doesn't have to be programmatic -- in fact, I'd prefer it not be programmatic. I just want to wipe it off the disk.
>> >
>> > Help!
>> >
>> > Thanks,
>> > Luke Sneeringer_______________________________________________
>> >
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