view db/migrate/072_add_enumerations_position.rb @ 214:e0cbb39c0429 feature_73

* Add method to retrieve external repo URL (via /sys/projects/<id>/external-repository.xml?key=<key>)
author Chris Cannam <chris.cannam@soundsoftware.ac.uk>
date Thu, 10 Feb 2011 14:40:44 +0000
parents 513646585e45
children 622f24f53b42
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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