labelbase/django/templates/attachments/add_form.html

{% load i18n %}
{% load bootstrap %}

{% if form %}
<form method="post" enctype="multipart/form-data" action="{{ form_url }}" class="add-attachment">
    {% csrf_token %}
    <input type="hidden" name="next" value="{{ next }}"/>
    {{ form|bootstrap }}
    <br>
    <input type="submit"  class="btn btn-primary"  value="{% trans "Add attachment" %}"/>

</form>

{% endif %}