[Pyobjc-dev] NSMetadataQuery - Spotlight Query problems

[Chris S. <cj...@uo...>]

Hi All, i'm fairly new at PyObjC, so bear with me. I'm trying to
search the local FS for files using an MSMetadataQuery object. I've
been looking at the PredicateEditorSample here on
pyobjc.sourceforge.net, which I have based alot (read: all :) ) of my
code from. Heres some code from the class:



class SystemBridge(NSObject):
	#deleted some stuff
	query = objc.ivar()
	
	#deleted some more stuff

	def newQuery_(self, _filename, _filetype):
		self.query = NSMetadataQuery.alloc().init()

		#Create a notification so we can see what is happening with the search
		nf = NSNotificationCenter.defaultCenter()
		nf.addObserver_selector_name_object_(self, 'queryNotification:',
None, self.query)
	
		#Create the query
		self.query.setSortDescriptors_([NSSortDescriptor.alloc().initWithKey_ascending_('kMDItemDisplayName',
True)])
		self.query.setDelegate_(self)


#########Set the predicate, having problems here?
		#thePredicate =
NSPredicate.predicateWithFormat_("(kMDItemDisplayName LIKE[cd]
'preso*') && (kMDItemContentType LIKE[cd]
'com.apple.iwork.keynote.key')")
		thePredicate = NSPredicate.predicateWithFormat_("(kMDItemDisplayName = '*')")
		keynotePredicate =
NSPredicate.predicateWithFormat_("(kMDItemContentType =
'com.apple.iwork.keynote.key')")

                #Try a compound out instead of one just one of the
above... don't need to do this but I was experimenting
           	predicate =
NSCompoundPredicate.andPredicateWithSubpredicates_([keynotePredicate,
thePredicate])

		#Start the search
		self.query.setPredicate_(predicate)
		self.query.startQuery()
		return

	def queryNotification_(self, note):
		#Find the query status by looking at the note
		if note.name() == NSMetadataQueryDidStartGatheringNotification:
			print "Starting Search"
		elif note.name() == NSMetadataQueryDidFinishGatheringNotification:
			print "Search Finished"
			getQueryResults_(note)
		elif note.name() == NSMetadataQueryGatheringProgressNotification:
			print "Searching..."
		elif note.name() == NSMetadataQueryDidUpdateNotification:
			print "Found something"

	def getQueryResults_(self, notif):
		results = notif.object().results()
		NSLog("Search count = %d", len(results))


The weird thing is, i get zero search results. I can use the predicate
from this in another application (the Fortunes app example) and it
searches just fine, so i'm not so sure if it is my predicates causing
the problem.

Ouput:
Starting Search
And thats it. I'm expecting a count of the results, there are several
files that start with 'preso' that are keynote files, but no luck. Any
ideas would be appreciated! Thanks.