{% load rest_framework %}

<div class="form-group {% if field.errors %}has-error{% endif %}">
  {% if field.label %}
    <label class="sr-only">
      {{ field.label }}
    </label>
  {% endif %}

  <select class="form-control" name="{{ field.name }}">
    {% if field.allow_null or field.allow_blank %}
      <option value="" {% if not field.value %}selected{% endif %}>--------</option>
    {% endif %}
    {% for select in field.iter_options %}
        {% if select.start_option_group %}
          <optgroup label="{{ select.label }}">
        {% elif select.end_option_group %}
          </optgroup>
        {% else %}
          <option value="{{ select.value }}" {% if select.value|as_string == field.value|as_string %}selected{% endif %} {% if select.disabled %}disabled{% endif %}>{{ select.display_text }}</option>
        {% endif %}
    {% endfor %}
  </select>
</div>