Re: NSPredicate: To be, or not to be

[Gerriet M. Denkmann]

On 3 Jun 2008, at 11:52, [EMAIL PROTECTED] wrote:

On Mon, Jun 2, 2008 at 7:37 PM, Gerriet M. Denkmann
<[EMAIL PROTECTED]> 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: \"[EMAIL PROTECTED]"", 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: \"[EMAIL PROTECTED]"", i + 1 ,s );
        }
        
        [pool release];
        return 0;
}

Kind regards,

Gerriet.

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