20100714160406_add_polymorphic_answerable_to_appearance.rb 325 Bytes
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class AddPolymorphicAnswerableToAppearance < ActiveRecord::Migration
  def self.up
     add_column :appearances, :answerable_id, :integer
     add_column :appearances, :answerable_type, :string
  end

  def self.down
     remove_column :appearances, :answerable_id
     remove_column :appearances, :answerable_type
  end
end