Rails和Postgres数组列

Question

I have a model with an array column (box_ids). In my view I would like to have a field for each of the values in the array and three extra empty fields to be able to add new values to the array. How to go about this? I have the following:

  <%= f.fields_for "box_ids[]", @shop do |bid| %>
    <div class="form-group">
      <%= bid.label :box_id %> Box ID: <%= bid.text_field [WHAT HERE] %>
    </div>
  <% end %>

I don't know if this is the right approach but in any case I have no method to supply to text_field.

Any suggestions?

Edit:

This works:

  <% @shop.box_ids.each  do |bid| %>
    <div class="form-group">
      <%= label_tag :box_id %> Box ID: <%= text_field_tag "box_ids[]", bid %>
    </div>
  <% end %>
  <% 3.times do %>
    <div class="form-group">
      <%= label_tag :box_id %> Box ID: <%= text_field_tag "box_ids[]" %>
    </div>
  <% end %>

But that requires special handling in the controller - I would like to avoid that if possible.

Answer 1

  <%= f.fields_for "box_ids[]", @shop do |bid| %>
    <div class="form-group">
      <%= bid.label :box_id %> Box ID: <%= bid.text_field :box_ids %>
    </div>
  <% end %>