title: sunspot rails, adding extra param to search block fails
body: <p>Trying to implement search with Sunspot Gem wich is using Solr.Fulltext search works fine however adding extra search params returning zero results. Red all docs but to no avail I dont see my error, if any in below code. Any advise on how to fix this? I RE-indexed existing records.</p>
  
  <p>ProfilesController#index</p>
  
  <pre><code>@search = Profile.search do
  
        fulltext params[:search]
  
        if params[:search].present?
          fulltext params[:description] do
            highlight :description
          end
        end
  
        if params[:gender].present?
          with :gender
        end
        paginate(:page =&gt; params[:page], :per_page =&gt; 2)
      end
  
      @profiles = @search.results
  </code></pre>
  
  <p>profiles.rb model</p>
  
  <pre><code>searchable do
      text :description
      string :gender 
  end
  </code></pre>
  
  <p>My search form:</p>
  
  <pre><code>= simple_form_for profiles_path, :method =&gt; :get  do |f|
  
    = text_field_tag :search, params[:search]  &lt;&lt; this works
    = text_field_tag :gender, params[:gender]  &lt;&lt; adding this line returns 0 result
  </code></pre>
  
  <p>Params gender can be "male" or "female" without quotes this param is also submitted by the form. </p>