显示复选框列表而不是多选

我有一个带有序列化属性 a 的模型 MyModel，描述了一个符号数组.

I have a model MyModel with a serialized attribute a, describing an array of symbols.

此代码有效:

<% form_for @my_model do |f| %>
  <%= f.select :a, MyModel::AS, :multiple => true) %>
<% end %>

参数正确:

{ :my_model => { :a => [:a_value1, :a_value2] } }

我想将这个多选转换成一组复选框，如下所示:

I want to transform this multiple select into a set of checkboxes, like this :

<% form_for @my_model do |f| %>
  <% MyModel::AS.each do |a_value|
    <%= f.check_box(:a_value) %>
  <% end %>
<% end %>

它也能用，但参数根本不一样:

It works too, but the parameters are not the same at all :

{ :my_model => { :a_value1 => 1, :a_value2 => 1 } }

我想到了两个解决方案，回到第一个解决方案......

I think of 2 solutions to return to the first solution...

• 将我的 check_box 转换为 check_box_tag，替换多个选择，并添加一些 javascript 以在用户单击 check_box_tags 时检查"选择值.然后，参数将直接在控制器中相同.
• 在控制器中添加一小段代码以调整"我的参数.

• Transform my check_box into check_box_tag, replace multiple select, and add some javascript to 'check' select values when user clic on check_box_tags. Then, the parameter will be the same directly in the controller.
• Add a litte code into the controller for 'adapting' my params.

什么解决方案不那么难看?或者还有别的吗?

What solution is the less ugly ? Or is there any other one ?