cache_with_versions.rb

<!-- app/views/stores/show.html.erb -->
<% cache ["v3", @store] do%>
  <h1>Store: <%= @store.name %></h1>

  <%= render @store.employees %>
<% end %>

<!-- app/views/employees/_employee.html.erb -->
<% cache ["v3", employee] do %>
  <div class='employee'>
    <span><%= employee.name %></span>
    <p><%= employee.position %></p>
  </div>
<% end %>