app/views/users/list_superusers.html.erb
<% title "Manage superusers" %>
<%= field_set_tag 'Add superusers' do %>
<div>With great power comes great responsiblity. Please use this wisely.</div>
<%= form_tag update_superusers_users_path do %>
Enter login of the user who want to make superuser:
<%= text_field_tag 'new_su_login' %>
<%= submit_tag "Add" %>
<% end %>
<% end %>
<p>Existing superuser list:</p>
<%= form_tag do %>
<table class="table_listing">
<tr>
<th>Login</th>
<th>Name</th>
<th>Remove su?</th>
</tr>
<% User.superusers.each do |su| %>
<tr>
<td><%= su.login %></td>
<td><%= su.name %></td>
<td><%= check_box_tag('remove_su_ids', su.id) %></td>
</tr>
<% end %>
</table>
<%= submit_tag "Remove selected" %>
<% end %>