{% set mainPicture = animal.getMainPicture() %}
{% if mainPicture is not null %}
<a href="{{ path('document_show', {'id':  mainPicture.document.id}) }}" target="_blank" title="{{ mainPicture.document.path }}">
    <img src="{{ asset('uploads/documents/' ~ mainPicture.document.path) }}" class="{{ img_class|default('img-fluid mx-auto d-block') }}" />
</a>
{% endif %}