Rails - Dec 2005 - simple paging question

I''m trying to page through records returned from a search:


donor controller:


  def search
    str = params[:donor][:search_string] + ''%''
    @donor_pages, @donors = paginate :donors, :per_page => 5,
:conditions => ["last_name LIKE ?", str]
    render(:template => ''donor/list'')
  end


in my main view:

<%= text_field ''donor'', ''search_string''
%>



I''m trying to reuse the exsting ''list'' template,
which works, but I''m
wondering how to persist the search string in order to be able to page
thru the results.  I mean, I can think of various ways to do it, but
am unclear what the Rails way is. Do I simply append the search string
to the link?

Thanks!