gistfile1.txt

class AnnonceController < ....
  def index
    get_ads(params)
  end

  def method_missing
    category = request.uri.do-some-extracting-of-last-name (jagthunde, racehunde, etc)

    get_ads({:category => category} + params)
    render :action => 'index'
  end

  protected

  def get_ads(options)
    ...her indsættes koden til at udtrække de relevante annoncer

    @ads = some_find_thing.....
  end
end