notebook/app/views/content/panels/_collections.html.erb

<div id="collections_panel" class="panel">
  <%= render partial: 'notice_dismissal/messages/09' %>

  <div class="grey-text uppercase center">
    <%= content.name %> is included in the following collections
  </div>

  <% content.page_collection_submissions.accepted.each do |submission| %>
    <% collection = submission.page_collection %>
    <%= link_to collection do %>
      <div class="hoverable card">
        <div class="card-image">
          <%= image_tag collection.first_public_image, style: 'max-height: 300px;' %>
          <span class="card-title">
            <%= collection.title %>
            <small>
              by
              <span class="<%= User.color %>-text text-lighten-5">
                <%= collection.user.display_name %>
              </span>
            </small>
            <br />
            <small>
              <% if collection.subtitle? %>
                <%= collection.subtitle %>
              <% else %>
                <small>
                  <% collection.page_types.each do |icon| %>
                    <% klass = content_class_from_name(icon) %>
                    <i class="material-icons left bordered-text <%= klass.color %>-text"><%= klass.icon %></i>
                  <% end %>
                </small>
              <% end %>              
            </small>
          </span>
        </div>
      </div>
    <% end %>
  <% end %>
</div>