def new
      hash = {}

      if step = Step.find_by_id(params["step_id"])
        hash[:stepable] = step
      end

      @step = @step_class.new hash
    end
def new
      hash = {}

      if step = Step.find_by_id(params["step_id"])
        hash[:stepable] = step
      end

      @step = @step_class.new hash
    end
GET /steps/new