Re: Having problem with fetch request in NSDocument based application
Re: Having problem with fetch request in NSDocument based application
- Subject: Re: Having problem with fetch request in NSDocument based application
- From: "I. Savant" <email@hidden>
- Date: Fri, 4 Sep 2009 09:50:44 -0400
On Sep 4, 2009, at 9:47 AM, Clayton Leitch wrote:
Here is the code in MyDocument:
-(IBAction)calculateStat:(id)sender{
fetchedObjects = nil;
context = [self managedObjectContext];
fetchRequest = [[NSFetchRequest alloc] init];
entity = [NSEntityDescription entityForName:@"Measurement"
inManagedObjectContext:context];
[fetchRequest setEntity:entity];
fetchedObjects = [context executeFetchRequest:fetchRequest
error:&error];
if (fetchedObjects == nil) {
NSLog(@"error");
[errorMessage setStringValue:@"no objects"];
}else {
[errorMessage setIntValue:[fetchedObjects count]];
}
[fetchRequest release];
The fetchedObjects count is always 0. Any idea what silly thing I
forgot.
... do you *have* any "Measurement" instances in your context? Have
you used the debugger to verify that all your variables were assigned
objects when / as you expected?
--
I.S.
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