<%= simple_form_for(@clock) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.association :users %>
    <%= f.association :statuses %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

<%= simple_form_for(@clock) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.association :users %>

    <% @clock.statuses.each do |status| %>
      <%= render partial: 'statuses/form', locals: { '@status'.to_sym => status } %>
    <% end %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

Embed the status form partial in clock's edit
Embed the status form partial in clock's edit
