symposion_app/symposion/templates/schedule/_slot_edit.html

{% load i18n bootstrap_tags %}
<form id="slotEditForm" class="modal-form" method="POST" action="{% url schedule_slot_edit slug slot.pk %}">
    <div class="modal-header">
        <a class="close" data-dismiss="modal">&times;</a>
        <h3>{% trans "Edit Slot" %}</h3>
    </div>
    <div class="modal-body" style="height:350px">
        {% csrf_token %}
        {{ form|as_bootstrap }}
    </div>
    <div class="modal-footer">
        <button type="submit" class="btn btn-primary">Save</button>
    </div>
</form>