Re: NSPredicate: To be, or not to be
Re: NSPredicate: To be, or not to be
- Subject: Re: NSPredicate: To be, or not to be
- From: "Gerriet M. Denkmann" <email@hidden>
- Date: Tue, 3 Jun 2008 15:18:32 +0700
On 3 Jun 2008, at 11:52, email@hidden wrote:
On Mon, Jun 2, 2008 at 7:37 PM, Gerriet M. Denkmann
<email@hidden> wrote:
On 3 Jun 2008, at 03:30, stephen joseph butler wrote:
I'm sorry. I forget that the Spotlight predicate strings are
slightly
different from the regular ones. This works for me:
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K LIKE
%@", kMDItemTextContent, @"To be, or not to be"];
This one also works for me. Only it kind of works too well, finding
thousands of files.
Another example: <kMDItemTextContent LIKE "Briggel Braggel"> finds
".../Test.txt" which only contains the line: "Briggel and Braggel" .
But I really want only files which contain "Briggel Braggel" or
"the Briggel
Braggel of today".
Again: How to create a predicate for an 10.4.11 NSMetadataQuery to
find a
string which includes blanks.
Possible answers:
Escape the blanks with ..., or
Enclose whole string with ..., or something else ?
For me, the following only finds one match when run with "To be, or
not to be" (a file from Fink)... not the thousands you're getting. And
if I create only one file on my system with "Briggel and Braggel", I
get no hits for "Briggel Braggel" (and only one for the correct
phrase).
I'm not sure what's different about your code, but I suspect the
problem isn't the NSPredicate.
I modified your example slightly (to make it palatable to Tigers) and
it behaves quite differently to what you are seeing.
Output:
Finding: "Briggel Braggel"
Predicate: <kMDItemTextContent LIKE[cd] "Briggel Braggel">
1: "/Volumes/เม่น/Users/gerriet/Desktop/Briggel and
Braggel.txt"
2: "/Volumes/เม่น/Users/gerriet/Library/Mail/.../Sent
Messages.mbox/Messages/52191.emlx"
3: "/Volumes/เม่น/Users/gerriet/Library/Mail/Mailboxes/
Lists/Dev.mbox/Messages/52203.emlx"
The first file (Briggel and Braggel.txt) contains only the line:
"Briggel and Braggel".
Maybe Tiger behaves diffently to Leopard (at least Spotlight-wise)?
So: Any suggestions for a Tiger-solution?
Here is my code:
#import <Foundation/Foundation.h>
#include <CoreServices/CoreServices.h>
int main (int argc, const char * argv[])
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
if (argc != 2)
{
NSLog( @"usage: %s <query>", argv[ 0 ] );
return 1;
}
NSString *value = [NSString stringWithCString:argv[ 1 ]];
NSLog(@"Finding: \"%@\"", value);
NSPredicate *predicate = [NSPredicate predicateWithFormat:
@"%K LIKE[cd] %@",
kMDItemTextContent,
value];
NSLog(@"Predicate: <%@>", predicate);
NSMetadataQuery *query = [[NSMetadataQuery alloc] init];
[query setPredicate:predicate];
[query startQuery];
while ([query isGathering])
[[NSRunLoop currentRunLoop]
runMode:NSDefaultRunLoopMode
beforeDate:[NSDate distantFuture]];
unsigned resultCount = [ query resultCount ];
for (unsigned i = 0; i < resultCount; i++ )
{
NSMetadataItem *item = [query resultAtIndex: i ];
NSString *s = [item valueForAttribute:(NSString*)kMDItemPath];
NSLog( @"%5u: \"%@\"", i + 1 ,s );
}
[pool release];
return 0;
}
Kind regards,
Gerriet.
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