Text fields from array in Rails

I'm trying to generate a set of text fields for an array using Rails 2.3. I have an array in my controller (which is not part of the model), and I'd like to make a text field for each entry. The array is like:

@ages = [1, 3, 7] # defaults

Then, I'd like to generate 3 text field in my view with the values 1, 3, and 7, and have the array filled with the user's values when submitted.

I found a bunch of stuff on Google and her开发者_如何转开发e, but none that seemed to work for me. I'm sure this is easy in Rails...

Rails can serialize collections, which should make this easier.

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

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

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

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