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PO"CoreData does not support persistent cross-store relationships" despite matching x-coredata ids
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copied!<p>When saving a Core Data managed object context on iOS 6.0.1 to a SQLite store, I run into a strange "CoreData does not support persistent cross-store relationships" exception. It concerns a one-to-one relationship between Quotes and AbstractSources in the model. At runtime it concerns a Quote and a Book (where Book inherits from AbstractSource. All works well in the model editor.)</p> <p>I've researched similar reports and covered the reported causes:</p> <ol> <li>I am assigning both the Quote and the Book to the same persistent store using assignObject:toPersistentStore:, so neither remains unassigned.</li> <li>The error description shows that all "absolute" x-coredata ids start with the same prefix (e.g. "x-coredata://82B3BEB3-60F2-4912-AC80-11AAD29CFF99/", so there really seems to be one store only in use.</li> </ol> <p>My questions are these:</p> <ol> <li>Is there anything else I have to check (perhaps sg. in relation to AbstractSource, which I do not touch/control in my source? I am creating both the Quote and the Book with a call to initWithEntity:insertIntoManagedObjectContext each.)</li> <li>I noticed that the error description also includes several "relative" x-coredata ids (of the form "x-coredata:///..."). Could it be that the absolute form is always considered as "cross-database", even if "absolute" prefixes (see example above) are the same? And if so, how could I influence any choice between "absolute" and "relative" x-coredata ids?</li> </ol> <p>Thx (much) for your attention!</p>

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