SonataAdminBundle/Resources/views/CRUD/list__action_edit.html.twig

{% if admin.isGranted('EDIT') and admin.hasRoute('edit') %}
    <a href="{{ admin.generateUrl('edit', {'id': admin.id(object)}) }}" class="edit_link" title="{% trans from 'SonataAdminBundle' %}action_edit{% endtrans %}">
        <img src="{{ asset('bundles/sonataadmin/famfamfam/page_white_edit.png') }}" alt="{% trans from 'SonataAdminBundle' %}action_edit{% endtrans %}" />
    </a>
{% endif %}