zeus.ugent.be/layouts/partials/_event_preview.erb

<div class="box event-preview">
  <div class="image-holder">
    <img src="https://placehold.it/150x150" alt="" class="image" />
  </div>

  <div class="box info">
    <div class="title">
      <a href="<%= relative_path_to(event) %>">
        <%= event[:title] %>
      </a>
    </div>
    <div class="location">
      <a href="#">
        <%= event[:location] %>
      </a>
    </div>
    <div class="description">
      <%= event[:description] %>
    </div>
    <div class="time">
      <%= event[:time] %>
    </div>
  </div>

  <% if @main_event %>
    <div class="box main-event">
      <p>
        <%= main_event[:title] %>
      </p>
      <ul>
        <% sub_events(main_event).each do |sub_event| %>
          <li class="<%= "active" if sub_event[:title] == (event[:title])%>" >
            <%= sub_event[:title] %>
          </li>
        <% end %>
      </ul>
    </div>
  <% end %>
</div>