Hi guys, I've adopted a pragmatical workaround that insanely works: ar = %x[mdfind -literal 'kMDItemDisplayName == *.pdf && kMDItemFSSize > 100000'].split("\n") p "found #{ar.count} pdf > 100.000 bytes" In this way I can do something like that: ar2d = ar.collect {|x| [Digest::MD5.hexdigest(File.read(x)), x]} that is, perform an operation for each file found and assign the result to the file path. I am fully satisfied now, although this does not directly use the CoreServices framework, my interest is in understanding more fully how to use MD* interfaces directly in the code MacRuby, so if someone managed to do it I'd love to hear news. greetings, Franco Rondini

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Message: 1 Date: Tue, 1 Mar 2011 00:12:53 +0100 From: Franco Rondini <rondinif@yahoo.it> To: macruby-devel@lists.macosforge.org Subject: Re: [MacRuby-devel] Trying to use spotlight programmatically Message-ID: <3964BBA2-BB57-4860-B45B-39B3E1742351@yahoo.it> Content-Type: text/plain; charset="us-ascii"

Hello , The code posted by Kaelin works great for me, After counting the number of search results now I would like to know the path of files found but to do this I have big difficulty

I'm trying to figure out how to make it works the MDQueryGetAttributeValueOfResultAtIndex or MDItemCopyAttribute to read out the KMDItemPath or KMDItemFSName but I was a bit confused by the "Pointer" returned and even I get a # Illegal instruction as you can see in the following code:

framework "CoreServices" #=> true query = MDQueryCreate(KCFAllocatorDefault, "kMDItemDisplayName = '*.pdf'", [KMDItemFSName,KMDItemPath] , nil) #=> #<__NSCFType:0x2005d63a0> MDQueryExecute(query, KMDQuerySynchronous) #=> true # item = MDQueryGetResultAtIndex(query, 1); #=> #<Pointer:0x20052dc80> count = MDQueryGetResultCount(query) p "found #{count} documents" #=> 981 a = MDQueryGetAttributeValueOfResultAtIndex(query, KMDItemFSName, 2) p a #<Pointer:0x20059aee0> ..not a NSString p a[0] #0 p a[1] #4

item_ref = MDQueryGetResultAtIndex(query, 1) p item_ref #<Pointer:0x200582460> p item_ref.class #Pointer ..not a MDItemRef path = MDItemCopyAttribute( item_ref, KMDItemPath) #Illegal instruction p path

I've found an older post of 2009 titled: "[MacRuby-devel] spotlight - MDItemRef" where Laurent said: "I'm afraid the MD* APIs haven't been covered by BridgeSupport yet.." but because of i can see the MDQueryGetResultCount working I hope that there is a way to enumerate the results of the query to get the attributes ( path especially ) I would be very happy if anyone has any idea, Thanks Franco