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POCore data multiple managedObjectContexts
 

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    <p>Update: note that the actual problem here wasn't with core data more with a bad property declaration of mine - strong/weak - that resulted in the object being released between viewWillLoad and viewDidLoad of the new view. </p> <p>I'm working through Tim Isted's book on Core Data in iOS and have been doing fine up until now. I'm trying to follow how the new viewController uses a second managedObjectContext - editingContext in the below - to capture changes in the text fields before saving. </p> <pre><code>- (void)setCurrentPerson:(AWPerson *)aPerson { if( !aPerson ) { aPerson = [AWPerson randomPersonInManagedObjectContext:self.editingContext]; } else if( [aPerson managedObjectContext] != self.editingContext ) { self.title = @"Edit person"; aPerson = (id)[self.editingContext objectWithID:[aPerson objectID]]; } [...] } </code></pre> <p>At this point: <code>aPerson = (id)[self.editingContext objectWithID:[aPerson objectID]];</code> when I print the description in the debugger for aPerson I should get</p> <pre><code>&lt;AWPerson: 0x6b5de70&gt; (entity: Person; id: 0x6b5bb60 &lt;x-coredata://A6EC85F2-81A8-488F-B2E3-F82687C252A2/Person/p1&gt; ; data: { dateOfBirth = "1973-11-03 12:53:58 +0000"; eyeColor = "(...not nil..)"; firstName = Peter; lastName = Dickens; yearOfBirth = 1973; </code></pre> <p>instead I get the following where <code>&lt;fault&gt;</code> has replaced the values</p> <pre><code>&lt;AWPerson: 0x6b609d0&gt; (entity: Person; id: 0x6b5bb60 &lt;x-coredata: //A6EC85F2-81A8-488F-B2E3-F82687C252A2/Person/p1&gt; ; data: &lt;fault&gt;) </code></pre> <p>I really can't see what's happening. Before the line aPerson has the values, after the line, they are replaced. Any help would be greatly appreciated.</p> <p>Thanks, Steve </p>
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    1. COThanks Jody & Rog. You helped me understand faults a lot better and work my way through this. I'm still struggling with the line that has objectWithId but I'll get there. Today however I learnt the importance of getting strong/weak property declarations right. I was losing the values somewhere between viewWillLoad and viewDidLoad. After hours [and hours] of really starting to understand the debugger, I tracked down to an incorrect property declaration - cue much self-loathing : ) This is one that I'll know for next time. Thanks again, Steve
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