我想将选定的 :ammount 值作为 :quantity 传递给我的控制器。我做错了什么?
<%= label(:ammount, "Ammount:") %>
<%= select_tag(:ammount, options_for_select([1,2,3,4,5,6,7,8,9,10])) %>
<%= button_to 'Add to cart', line_items_path(:product_id => product.id, :quantity => :ammount) %>