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Re: Copy managed object between contexts?
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Re: Copy managed object between contexts?


  • Subject: Re: Copy managed object between contexts?
  • From: Jim Correia <email@hidden>
  • Date: Sat, 13 Aug 2005 20:40:03 -0400

On Aug 13, 2005, at 8:27 PM, Colin Cornaby wrote:

So in other words, Apple recommends doing it manually. :)

But you can write generic code once, and then use it over and over again. So it is only manual the first time :-)


@interface NSManagedObject(CopyAdditions)

- (void)copyAttributesFromObject:(NSManagedObject *)object
{
    NSArray *attributeKeys = [[self entity] attributeKeys];
    NSEnumerator *enumerator = [attributeKeys objectEnumerator];
    NSString *attributeName = nil;

while (nil != (attributeName = [enumerator nextObject]))
{
[self setValue: [object valueForKey: attributeName] forKey: attributeName];
}
}


@end

It is left as an exercise to the reader to do the same for relationships.

Jim
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  • Follow-Ups:
    • Re: Copy managed object between contexts?
      • From: Chris Hanson <email@hidden>
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      • From: mmalcolm crawford <email@hidden>
References: 
 >Copy managed object between contexts? (From: Colin Cornaby <email@hidden>)
 >Re: Copy managed object between contexts? (From: mmalcolm crawford <email@hidden>)
 >Re: Copy managed object between contexts? (From: Colin Cornaby <email@hidden>)
 >Re: Copy managed object between contexts? (From: mmalcolm crawford <email@hidden>)
 >Re: Copy managed object between contexts? (From: Colin Cornaby <email@hidden>)

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