view db/migrate/072_add_enumerations_position.rb @ 19:56fdca7d85a5 yuya

* Stylesheet updates to try to make the theme less overwhelming and a bit clearer
author Chris Cannam
date Thu, 16 Sep 2010 17:52:28 +0100
parents 513646585e45
children 622f24f53b42
line wrap: on
line source
class AddEnumerationsPosition < ActiveRecord::Migration
  def self.up
    add_column(:enumerations, :position, :integer, :default => 1) unless Enumeration.column_names.include?('position')
    Enumeration.find(:all).group_by(&:opt).each do |opt, enums|
      enums.each_with_index do |enum, i|
        # do not call model callbacks
        Enumeration.update_all "position = #{i+1}", {:id => enum.id}
      end
    end
  end

  def self.down
    remove_column :enumerations, :position
  end
end