app/views/ckeditor/shared/_asset.html.erb
<%= content_tag(:div, id: dom_id(asset), class: "gal-item", data: { url: image_path(asset.url_content) }) do %>
<%= link_to '', polymorphic_path(asset, format: :json),
remote: true,
method: :delete,
title: I18n.t('ckeditor.buttons.delete'),
data: { confirm: t('ckeditor.confirm_delete') },
class: "fileupload-cancel gal-del" %>
<div class="fileupload-file gal-inner-holder">
<div class="img"><%= image_tag(asset.url_thumb, title: asset.filename) %></div>
<div class="img-data">
<div class="img-name"><%= asset.filename %></div>
<div class="time-size">
<div class="time"><%= asset.format_created_at %></div>
<div class="fileupload-size size"><%= number_to_human_size(asset.size) if asset.size %></div>
</div>
</div>
</div>
<% end %>