awakeFromInsert question
awakeFromInsert question
- Subject: awakeFromInsert question
- From: Guillaume Rager <email@hidden>
- Date: Fri, 1 Jul 2005 15:09:36 +0200
Hi list,
i would like to add some default values using awakeFromInsert method
into my NSManagedObject subclass named Task.
to add some strings, dates or int values its very easy, i just have
to do that:
- (void) awakeFromInsert
{
[super awakeFromInsert];
[self setValue:@"test" forKey:@"title"];
}
to set a default title for example.
But i would like to do add a NSManagedObject subclass category. This
entity is linked to Task using a relationship. I have a list of
existing categories (work, home,...) and i want to setup my task with
a "work" category. So this is what i've done into awakeFromInsert
- (void) awakeFromInsert
{
[super awakeFromInsert];
// create the fetch request for the recipes
NSFetchRequest* fetchRequest = [[[NSFetchRequest alloc] init]
autorelease];
[fetchRequest setEntity: [NSEntityDescription
entityForName:@"Category" inManagedObjectContext:[self
managedObjectContext]]];
// set the affected stores
id store = [[self objectID] persistentStore];
if (store != nil) {
[fetchRequest setAffectedStores:[NSArray arrayWithObject:store]];
}
// set the predicate
[fetchRequest setPredicate:[NSPredicate
predicateWithFormat:@"value = %@",@"work"]];
NSError *error = nil;
NSArray *array = [[self managedObjectContext]
executeFetchRequest:fetchRequest error:&error];
if([array count]>0)
[self setValue:[array lastObject] forKey:@"category"];
}
So my question is simple, is there any better solution to link a new
entity (Task) to an existing entity (Category) ?
Thank you in advance.
Guillaume
-----------
GUMITECH - France
http://www.gumitech.com
"Chaud cocoa, chaud chocolat !"
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