Can something be done better?.rb

 # AJAX request: This adds line items to cart. 
  def add_line_item_to_cart
    #Get current_cart object
    current_cart
    
    quantity = params[:quantity].to_i
    id = params[:id].to_i
    line_item = LineItem.find_or_create_by_cartridge_id_and_cart_id(id, current_cart.id)
    
    line_item.quantity = line_item.quantity.to_i + quantity
    line_item.save
    render :text => current_cart.line_items.count.to_s
  end