netbox/netbox/templates/extras/configtemplate/attrs/data_file.html

{% load i18n %}
{% if object.data_file %}
  <a href="{{ object.data_file.get_absolute_url }}">{{ object.data_file }}</a>
{% else %}
  <div class="float-end text-warning">
    <i class="mdi mdi-alert" title="{% trans "The data file associated with this object has been deleted" %}."></i>
  </div>
  {{ value }}
{% endif %}