mongodb select tracks optimized

app/models/album.rb

@@ -32,5 +32,30 @@ class Album < ActiveRecord::Base
 			m[3][1]
 		end
 	end
+
+	def tracksInDb
+		tracks = []
+		result = []
+		tracks_in_db = []
+		track_ids = []
+
+		self.releases.first.tracks.each do |track|
+	  		tracks << track
+	  		track_ids << track.id.to_s
+	  	end
+	  	in_db = TrackData.any_in(id: track_ids).only("id")
+	  	unless in_db.nil?
+		  	in_db.each do |track|
+		  		tracks_in_db << track["id"].to_i;
+		  	end
+		end
+	  	tracks.each do |track|
+			result << {
+				:object => track,
+				:in_db  => tracks_in_db.include?(track.id) ? nil : true
+			}
+	  	end
+	  	result
+	end
 end
 

app/models/track.rb

@@ -1,8 +1,5 @@
 class Track < ActiveRecord::Base
 	set_table_name 'musicbrainz.bh_track'
 	belongs_to :release
-	
-	def inDb
-	  ! TrackData.where(id: id.to_s).empty?
-	end
 end
+