Re: Copy managed object between contexts?
Re: Copy managed object between contexts?
- Subject: Re: Copy managed object between contexts?
- From: Jim Correia <email@hidden>
- Date: Sat, 13 Aug 2005 20:58:17 -0400
On Aug 13, 2005, at 8:50 PM, mmalcolm crawford wrote:
On Aug 13, 2005, at 5:40 PM, Jim Correia wrote:
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 would be easier to use key-value coding
Well to be pedantic, I am using KVC, just in a loop :-).
But your point is taken - using the dictionary based methods
simplifies the code.
- (void)copyAttributesFromObject:(NSManagedObject *)object
{
NSDictionary *values = [object dictionaryWithValuesForKeys:
[[self entity] attributeKeys]];
[self setValuesForKeysWithDictionary: values];
}
Jim
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