20091219050747_add_index_to_prompts.rb 220 Bytes
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class AddIndexToPrompts < ActiveRecord::Migration
  def self.up
    add_index :prompts, [:left_choice_id, :right_choice_id]
  end

  def self.down
    remove_index :prompts, [:left_choice_id, :right_choice_id]
  end
end