I'm working with Ruby on rails 2.3.4 and I'd like to have a link that executes an action when clicked.

The relevant part of the routes.rb file looks like this:

map.search_filter_relevance "/anuncios/buscar", :controller => 'announcements', :action => 'search_filter_relevance'

My view(it's the model's index page) looks like this:

<%=  link_to 'M&Aacute;S RELEVANTES', search_filter_relevance_path %>

And my controller looks like this:

  def search_filter_relevance
    raise params.inspect
    unless params[:announcements].nil? or params[:announcements].empty?
      @announcements = params[:announcements].order_by_featured

    end
  end

The problem is that when I click the link I get an error due to some null value in the Show action! I'm not accessing that action at all...why is executing it?