app/views/documents/_form.html.erb
<%= form_for(@document, multipart: true) do |f| %>
<%= render 'shared/errors', object: @document %>
<div class="field">
<%= f.label :document_file %><br>
<div> <%= document_tag(@document) -%> </div>
<%= f.file_field :document_file, class: :required_for_submit %>
</div>
<div class="field">
<%= f.label :initialize_start_page, data: {help: 'If pages (print) are sequential supply the first page number.'} %><br>
<%= f.text_field :initialize_start_page %>
</div>
<div class="field">
<%= f.label :is_public, data: {help: 'Whether this is exposed to public APIs.'} %><br>
<%= f.check_box :is_public %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>