Added position on Enumeration model.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@800 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/072_add_enumerations_position.rb

@@ -0,0 +1,12 @@
+class AddEnumerationsPosition < ActiveRecord::Migration
+  def self.up
+    add_column :enumerations, :position, :integer, :default => 1, :null => false
+    Enumeration.find(:all).group_by(&:opt).each_value  do |enums|
+      enums.each_with_index {|enum, i| enum.update_attribute(:position, i+1)}
+    end
+  end
+
+  def self.down
+    remove_column :enumerations, :position
+  end
+end