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Re: core data, synchonizing multiple MOC's
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Re: core data, synchonizing multiple MOC's


  • Subject: Re: core data, synchonizing multiple MOC's
  • From: Jim Correia <email@hidden>
  • Date: Sat, 20 May 2006 08:06:51 -0400

On May 20, 2006, at 4:24 AM, Diederik Hoogenboom wrote:

I have a separate managed object context (threaded) in which I insert a managed object. When the thread completes I save the changes and try to make the main MOC aware of the new objects. However the changes are not visible in the tableview bound to the array controller (bound to the main MOC) . When I do the inserting using the main MOC everything works fine.

The method I use to make the main MOC aware of the second MOC is objectWithID using the result of objectID from the second MOC. Instead of objectWithID: I have also tried refreshObject: mergeChanges: with no result.

-objectWithID: doesn't make the MOC aware of the object. It causes the MOC to fetch the object or return a fault.


-refreshObject:mergeChanges is the right way to merge in the changes from another MOC, and for objects already in the UI, KVO will cause the objects to update via bindings.

If new objects appear, you need to arrange for your controllers to refetch.

Jim
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 >core data, synchonizing multiple MOC's (From: Diederik Hoogenboom <email@hidden>)

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