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view db/migrate/20090406161854_add_parent_id_to_enumerations.rb @ 751:7bf2d69e9aeb feature_14

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dev commit: project tag link helper function
author luisf <luis.figueira@eecs.qmul.ac.uk>
date Thu, 10 Nov 2011 11:14:52 +0000
parents 513646585e45
children
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class AddParentIdToEnumerations < ActiveRecord::Migration
  def self.up
    add_column :enumerations, :parent_id, :integer, :null => true, :default => nil
  end

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