{% load form_helpers %}

{% if form.fieldsets %}
{# Render hidden fields #}
{% for field in form.hidden_fields %}
{{ field }}
{% endfor %}

{# Render grouped fields according to form #}
{% for group, fields in form.fieldsets %}
<div class="card mb-3">
  {% if group %}
  <div class="card-header"><strong>{{ group }}</strong></div>
  {% endif %}
  <div class="card-body">
    {% for name in fields %}
    {% with field=form|getfield:name %}
    {% if field and not field.field.widget.is_hidden %}
    {% render_field field %}
    {% endif %}
    {% endwith %}
    {% endfor %}
  </div>
</div>
{% endfor %}
{% if form.tags %}
<div class="card mb-3">
  <div class="card-header"><strong>Tags</strong></div>
  <div class="card-body">
    {% render_field form.tags %}
  </div>
</div>
{% endif %}
{% if form.comments %}
<div class="card mb-3">
  <div class="card-header"><strong>Comments</strong></div>
  <div class="card-body">
    {% render_field form.comments %}
  </div>
</div>
{% endif %}
{% else %}
{# Render all fields in a single group #}
<div class="card mb-3">
  <div class="card-body">
    {% render_form form %}
  </div>
</div>
{% endif %}