Orbit/app/views/desktop/co_authors/_form.html.erb

<div class="fn_g hp">
  <%= f.submit "Save", name: "commit", value: "Save", class: "fn_btn hh2 thmc2 thmtxt" %>
<!--    <%= submit_tag "Cancel", :class=>"fn_btn hh2 bt-cancel thmc2 thmtxt" %>-->
</div>

<div></div>
<ul>
  <li class="s_grid_row">
  <%= f.label :co_author %><br />
  <%= f.text_field :co_author %>
  </li>

  <li class="s_grid_row">
  <%= f.label :email %><br />
  <%= f.text_field :email %>
  </li>

  <li class="s_grid_row">
  <%= f.label :type%><br />
  <select name="co_author[type]" id="" class="s_grid s_grid_4">
    <%= options_for_select(
      [["朋友","朋友"],
       ["學生","摯友"],
       ["老師","老師"],
       ["摯友","摯友"],
       ["親戚","親戚"],
       ["同事","同事"],
       ["共同作者","共同作者"]
    ])
  %>
  </select>
  </li>
</ul>