db/migrate/20151024082034_add_tokens_updated_on.rb


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class AddTokensUpdatedOn < ActiveRecord::Migration[4.2]
  def self.up
    add_column :tokens, :updated_on, :timestamp
    Token.update_all("updated_on = created_on")
  end

  def self.down
    remove_column :tokens, :updated_on
  end
end