class AddZettoTo<%= table_name.camelize %> < ActiveRecord::Migration<%= migration_version %>
  def change
    <% migration_data.each do |name, properties| %>
        add_column :<%= table_name %>, :<%= name %>, <%= properties %> unless column_exists? :<%= table_name %>, :<%= name %>
    <% end %>
  end
end