Untitled

def create
    @option_type = OptionType.new(params[:option_type])
    @product = Product.find_by_param!(params[:product_id])
    if @option_type.save
      respond_to do |format|
        format.html {
          redirect_to admin_option_types_url}
      end
    end
  end

# should be

  def create
    @option_type = OptionType.new(params[:option_type])
    @product = Product.find_by_param!(params[:product_id])
    respond_to do |format|
      if @option_type.save
        format.html {redirect_to admin_option_types_url}
      else
        format.html { render :action => "new" }
      end
    end
  end