{% url 'docs_aktrabot_add_by_invoice' invoice_id=obj.pk as url_aktrabot_by_invoice %}
{% url 'docs_nakladn_add_by_invoice' invoice_id=obj.pk as url_nakladn_by_invoice %}
{% url 'docs_faktura_add_by_invoice' invoice_id=obj.pk as url_faktura_by_invoice %}

<a href="{{ url_aktrabot_by_invoice }}" title="Акт по счёту" class="invoice-add-doc doc">Акт выполненных работ</a>

<a href="{{ url_nakladn_by_invoice }}" title="Накладную" class="doc invoice-add-doc ">Накладную</a>

<a href="{{ url_faktura_by_invoice }}" title="Счёт-фактуру" class="invoice-add-doc doc">Счёт-фактуру</a>