How to restore fields ("validates_presence_of")

I believe reloading fields is handled in the controller action for
create, scaffolding builds a create method like:
create
    @request = Request.new(params[:request])
    if @request.save
      flash[:notice] = 'Request was successfully created.'
      redirect_to :action => 'list'
    else
      render :action => 'new'
    end
end

the line
@request = Request.new(params[:request])
should reload the submitted values.

Seth