added the ability to set the sort order for trackers

git-svn-id: http://redmine.rubyforge.org/svn/trunk@209 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/021_add_tracker_position.rb

@@ -0,0 +1,10 @@
+class AddTrackerPosition < ActiveRecord::Migration
+  def self.up
+    add_column :trackers, :position, :integer, :default => 1, :null => false
+    Tracker.find(:all).each_with_index {|tracker, i| tracker.update_attribute(:position, i+1)}
+  end
+
+  def self.down
+    remove_column :trackers, :position
+  end
+end