Rails 可以序列化集合，这应该会更容易.

Rails can serialize collections, which should make this easier.

如果您在视图中像这样将输入命名为字段[]":

If you name your inputs like 'field[]' like this in your view:

<% @ages.each do |age| %>
  <%= text_field_tag 'ages[]', age %>
<% end %>

然后您可以在提交时访问控制器中的所有年龄":

Then you can access all 'ages' in your controller on submission:

@ages = params[:ages]  # ['1', '3', '7']