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Swift CoreData craziness
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| // Class Keyword: NSManagedObject is defined in objective-c (not sure if it matters) | |
| // .keywords is CoreData to-many relationship pointing to "Keyword" objects. | |
| // How do I convert .keywords to [Keyword]? | |
| po type(of: keywords) | |
| _NSFaultingMutableOrderedSet | |
| po keywords is NSOrderedSet | |
| true | |
| // NSOrderedSet does not store type information | |
| po type(of: keywords.array) | |
| Swift.Array<Any> | |
| // well this is expected | |
| po keywords.array is [Keyword] | |
| false | |
| // let's introspect an object | |
| expr let $k = keywords.array[0] | |
| //oh | |
| po $k is Keyword | |
| false | |
| //oh | |
| po type(of: $k) | |
| NSManagedObject_Keyword_ |
Surprise, in whole model only this class had Class Name empty :(. This prevented CoreData magic.
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keywords.array as [Keyword]should work. Thanks to magic inside compiler for bridging from objc to swift.If not working -
keywords.array.flatMap { $0 as? Keyword }