file_field上载按钮在编辑表单上多次出现

Question

I have this code in my _form.html.erb file:

<%= f.fields_for :request_attachments do |ra| %>
    <div class="row westmontTextMuseo3" id="uploader">
        <div class="col-xs-12">
          <label class="btn btn-info"> Upload Files
                <%= ra.file_field :request_attachment_file, :multiple => true, name: "request_attachments[file][]", :style => "display: none", type: "file" %>
                <%= ra.hidden_field :file_cache %> 
          </label>
        <%= link_to(ra.object.file.url.to_s.split('/')[-1], ra.object.file.url) %>
        </div>
    </div>
<% end %>

I can see why the Upload Files button appears. It seems like I want it outside the scope of the nested form, but I don't know how to do that.

My goal is to place the button once after it has provided links to each of the already attached files.

Any help would be great, thanks.

Edit: Other code to see if we can get it to work.

<%= f.fields_for :request_attachments do |ra| %>
  <%= link_to(ra.object.file.url.to_s.split('/')[-1], ra.object.file.url) %>
<% end %>

<div class="row westmontTextMuseo3" id="uploader">
  <div class="col-xs-12">
    <label class="btn btn-info"> Upload Files
      <%= @request.request_attachments.file_field :request_attachment_file, :multiple => true, name: "request_attachments[file][]", :style => "display: none", type: "file" %>
      <%= @request.request_attachments.hidden_field :file_cache %> 
    </label>
  </div>
</div>

But this fails with an undefined method file_field' for #<RequestAttachment...

Answer 1

This seemed to have worked

<%= f.fields_for :request_attachments do |ra| %>
  <div class="row">
    <div class="col-xs-12">
      <%= link_to(ra.object.file.url.to_s.split('/')[-1], ra.object.file.url) %>
    </div>
  </div>
<% end %>

<div class="row westmontTextMuseo3" id="uploader">
  <div class="col-xs-12">
    <label class="btn btn-info"> Upload Files
      <%= file_field_tag :request_attachment_file, :multiple => true, name: "request_attachments[file][]", :style => "display: none", type: "file" %>
      <%= hidden_field_tag :file_cache %> 
    </label>
  </div>
</div>

I assumed since the attributes were nested it wouldn't work, but it did work.