Update track length in db if empty. Closes #107

app/controllers/track_controller.rb

@@ -0,0 +1,18 @@
+class TrackController < ApplicationController
+  before_filter :authorize
+  
+  def update_length
+    unless params[:track_id].nil?
+      track = Track.find(params[:track_id])
+      unless track.nil? or params[:length].nil?
+        if track.length == nil or track.length.to_i == 0 and params[:length].to_i > 0
+          track.length = params[:length].to_i
+          track.save
+          render :json => { :result => :success }
+          return
+        end
+      end
+    end
+    render :json => { :result => :failed }
+  end
+end