notebook/app/views/content/deleted.html.erb

<div class="row">

  <div class="col s12">
    <div class="card red lighten-5">
      <div class="card-content">
        <p class="grey-text text-darken-3">
          Pages can be "un-deleted" for up to 24 hours after deletion.
          After this time, they are permanently deleted and cannot be recovered.
          Use this page if you've accidentally deleted a page and need to recover it.
        </p>
      </div>
    </div>
  </div>

  <div class="col s12">
    <% showed_any_content = false %>

    <% @content_pages.each do |content_type_name, content_list| %>
      <% next unless content_list.any? %>
      <% showed_any_content = true %>

      <%
        content_type = content_type_name.constantize
        category_ids_for_this_content_type = AttributeCategory.where(entity_type: content_type_name.downcase, user_id: current_user).pluck(:id)
        name_field = AttributeField.find_by(field_type: 'name', attribute_category_id: category_ids_for_this_content_type)

        content_ids = content_list.pluck(:id)
        if name_field
          list_name_lookup_cache = Hash[
            name_field.attribute_values.where(
              entity_type: content_type_name
            ).pluck(:entity_id, :value)
          ]
        else
          list_name_lookup_cache = {}
        end
      %>

      <div class="row">
        <div class="col s12 m3 l2 grey-text">
          <h4 style="text-align: right">
            <%= content_type_name.pluralize %>
          </h4>
        </div>
        <div class="col s12 m9 l9 offset-l1">
          <div class="card">
            <div class="card-content" style="padding: 0;">
              <ul class="collection" style='border: 0'>
                <% content_list.each do |content| %>
                  <li class="collection-item avatar">
                    <%= link_to content do %>
                      <i class="material-icons circle <%= content.class.color %>"><%= content.class.icon %></i>
                    <% end %>
                    <span class="title">
                      <%= (content.respond_to?(:label) ? content.label : list_name_lookup_cache[content.id].presence || content.name) %>
                      <small class="grey-text">
                        <% universe_field_value = content.universe_field_value %>
                        <% if universe_field_value.present? %>
                          <i class="material-icons"><%= Universe.icon %></i>
                          <%# todo remove this hack %>
                          <%
                            if universe_field_value.is_a?(Integer)
                              universe_field_value = Universe.find_by(id: universe_field_value, user: content.user)
                            end
                          %>
                          <% if universe_field_value %>
                            <%= link_to universe_field_value.try(:name), universe_field_value %>
                          <% end %>
                        <% end %>
                      </small>
                      <% if user_signed_in? && (
                          (content.universe_field_value.present? && universe_field_value.try(:user) != current_user) ||
                          (content.is_a?(Universe) && content.user != current_user)
                        )
                      %>
                        <span class="new badge grey white-text tooltipped" style="float: inherit; margin: 0;" data-badge-caption="contributing"
                          data-position="bottom" data-delay="100" data-tooltip="You have been added as a contributor to this universe and its content."></span>
                      <% end %>
                    </span>
                    <p class='grey-text'>
                      <span class="timestamp tooltipped" data-position="bottom" data-delay="500" data-tooltip="<%= content.deleted_at.strftime("%m/%d/%Y %H:%M") %>" style="font-size: 80%">
                        <i class="material-icons">delete</i>
                        deleted <%= time_ago_in_words content.deleted_at %> ago
                      </span>
                      <span class="timestamp tooltipped" data-position="bottom" data-delay="500" data-tooltip="<%= content.deleted_at.strftime("%m/%d/%Y %H:%M") %>" style="font-size: 80%">
                        <i class="material-icons">alarm</i>
                        recoverable for the next <%= distance_of_time_in_words(DateTime.current, content.deleted_at + 24.hours) %>
                      </span>
                    </p>
                    <span class="secondary-content">
                      <%= form_for content do |f| %>
                        <%= f.hidden_field :deleted_at, value: nil %>
                        <%= f.submit 'Recover', class: 'white btn black-text' %>
                      <% end %>
                    </span>
                  </li>
                <% end %>

              </ul>
            </div>
          </div>
        </div>
      </div>

    <% end %>

    <% if !showed_any_content %>
      <p class="grey-text">
        Looks like you haven't deleted any pages in the past 24 hours. If you do, they will show up here for a limited time.
      </p>
    <% end %>



  </div>
</div>