class <%= "#{migration_name.classify.pluralize}" %> < <%= migration_class_name %>
  def change
  <% attributes_names.each do |attribute| %>
    add_column :<%= name.tableize %>, <%= ":#{attribute}_token" %>, :string, default: nil
    add_column :<%= name.tableize %>, <%= ":#{attribute}_created_at" %>, :timestamp, default: nil
    add_column :<%= name.tableize %>, <%= ":#{attribute}_sent_at" %>, :timestamp, default: nil
    add_column :<%= name.tableize %>, <%= ":#{attribute}_completed_at" %>, :timestamp, default: nil

    add_index :<%= name.tableize %>, <%= ":#{attribute}_token" %>
  <% end %>
  end
end