Actually your guess is wrong.  Core Data could handle this by turn the object 
to fault.  Have a look at the method refreshObject:mergeChanges.


Bob Cromwell

On 2012-11-15, at 上午10:30, William Squires wrote:

> 1) Can CoreData properly manage an object graph where the objects form a 
> circular reference (i.e.)
> 
> Entity Node
>  int nodeType
>  Node onTopOf // 1:1 relationship to another Node entity
>  Node under // another 1:1 relationship
> End
> 
> This would be a doubly-linked list in a circular queue so that you could go 
> either direction from any Node entity. My guess is… no.
> 
> 2) Without CoreData, if I simply declare in my model classes that they 
> implement <NSCoding> (and I implement all the initWithCoder: and 
> encodeWithCoder: methods), will this properly handle such a situation (i.e. a 
> possibly circular object graph)?
> 
> 
> 
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