{% if object.conversationhomework|length > 0 %}
    <a class="btn btn-sm btn-primary"
       href="{{ admin.generateObjectUrl('conversationhomework', object) }}" title="{{ "admin.cours.listeconv"|trans }}">
        <i class="fa fa-comments" aria-hidden="true"></i>
    </a>
{% else %}
    <a class="btn btn-sm btn-warning"
       href="javascript:void(0);" title="{{ "admin.cours.noconv"|trans }}">
        <i class="fa fa-commenting" aria-hidden="true"></i>
    </a>
{% endif %}