gistfile1.txt

  
class SomeController
  before_filter :find_product
  before_filter :sanitise_segment

  def show
    @product.reviews.for_segment(@segment).order_by(sort_order)
  end

  def show_extended_detail
    @product.reviews.for_segment(@segment).order_by(sort_order)
    …
  end

  protected
    def sort_order
      # Google was indexing "random" search orders, it parsed our javascript, badly.
      SORT_METHODS[params[:sort_order]] or raise_redirect_to(@product, :status => 301)
    end

    def find_product
      @product = …
    end

    def sanitise_segment
      @segment = params[:segment]
      @segment = @segment.to_sym if %w[all other].include?(@segment)
      @segment = nil if @segment == :all
      # Bad or expired segments need 301ing
      redirect_to(@product, :status => 301) if @segment === String and !@product.segments.include?(segment)
    end
end