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POCore Data & UIManagedDocument in Xcode 4.3: Can't merge models
 

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  1. POCore Data & UIManagedDocument in Xcode 4.3: Can't merge models
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    <p>I'd like to thank all the people that contribute to this website. I am one h*ll of a noob at programming and you all help me out so much. With that said, let's get on with my latest problem!</p> <p>I am creating an app that uses a <code>UIManagedDocument</code> to store a Core Data model for me. I use to create the <code>UIManagedDocument</code> with the following code, but now with Xcode 4.3.2 (The one that updates with the Mac App Store) I have an issue.</p> <p>Here's the code:</p> <pre><code> NSURL *url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]; url = [url URLByAppendingPathComponent:@"MyFile"]; NSLog(@"\n\n This line does print. \n\n"); UIManagedDocument *document = [[UIManagedDocument alloc] initWithFileURL:url]; NSLog(@"\n\n This line does not print \n\n"); </code></pre> <p>I receive an error in the console that goes like this:</p> <p><strong>Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't merge models with two different entities named 'Foo''</strong></p> <p>Here's the thing, I'm not trying to get versions or anything like that to work. I'm simply creating a data model with two types of entities, and trying to get a UIManagedDocument to open in my app: super simple, right?</p> <p>I have uninstalled Xcode and reinstalled it to no luck. I have also deleted my Core Data Model and redone it from scratch with no luck.</p> <p>I am completely lost and have already spent about 2 nights trying to troubleshoot this.</p> <p>Help me! Please! Thanks for reading. If you need anymore information let me know. I'll give you my soul for an answer...</p>
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    1. COAny chance you have more than one .xcdatamodel being added to your bundle? Or maybe multiple versions of the model with the same version number?
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    2. COI only have one .xcdatamodel in my project folder. And I literally create the new Core Data Model, add two entities, then run the project. What could I be doing to create multiple versions of the same Data Model?
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    3. COIf you don't know, you're probably not doing it (there's an "Add Model Version" option in Xcode).
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