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POCore Data Relationship Failing to Load To-One Relationship
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  1. POCore Data Relationship Failing to Load To-One Relationship
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    copied!<p>I have a to-one relationship between a Document and Settings model:</p> <p><img src="https://i.stack.imgur.com/DRen1.png" alt="alt text"></p> <p>On creation of a Document, a corresponding Settings object is created. The models are persisted to core data.</p> <p>When relaunching after creating a few documents (and the associate settings), the application reloads a list of documents to select using:</p> <pre><code>// Load delegate from shared application and context from delegate. SampleAppDelegate *delegate = [[UIApplication sharedApplication] delegate]; NSManagedObjectContext *context = delegate.managedObjectContext; // Create new request. NSFetchRequest *request = [[NSFetchRequest alloc] init]; // Create entity description using delegate object context. NSEntityDescription *entity = [NSEntityDescription entityForName:@"Document" inManagedObjectContext:context]; // Set entity for request. [request setEntity:entity]; // Load array of documents. NSError *error; NSArray *documents = [context executeFetchRequest:request error:&amp;error]; // Rlease descriptor. [descriptor release]; // Release request. [request release]; // Done. return documents; </code></pre> <p>The list appears fine (the documents are loading). However, when attempting to access the settings for any of the documents the program exits giving:</p> <blockquote> <p>Program received signal: “SIGABRT”.</p> </blockquote> <p>The modifications to the settings are triggered when a user selects a button. Strangely enough, the program does not crash if the following snippet is added just before returning the documents on load (i.e. if the relationships are accessed while loading):</p> <pre><code>for (Document *document in documents) { NSLog(@"document.name: %@", document.name); NSLog(@"document.settings.stroke: %@", document.settings.stroke); NSLog(@"document.settings.stroke: %@", document.settings.stroke); } </code></pre> <p>The property for the relationship is "(nonatomic, retain)" and uses "@dynamic". Any ideas? Thanks!</p>
 

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