傳遞來自select_tag的值

Question

我想將選中的：ammount值傳遞給我的控制器：quantity。我做錯了什麼？

<%= 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) %> 

Answer 1

你應該用表格這裏傳遞數據controller`s行動：

<%= form_tag line_items_path(:product_id => product.id) do %> 
    <%= label(:ammount, "Ammount:") %> 
    <%= select_tag(:ammount, options_for_select([1,2,3,4,5,6,7,8,9,10])) %> 
    <%= submit_tag 'Add to cart' %> 
<% end %> 

所有你在你的源代碼確實只是路過符號:ammount到controller`s行動量PARAM。