Convert multiple conditions to nested if in template since Django has a bug with conditionals in templates.
{% extends "base.html" %}
{% block title %}Manage Payments - {% endblock %}
{% block content %}
<h1>Manage Payments</h1>
<form action="" method="post">
<fieldset>
<legend>Payment Details</legend>
<table class="scipycon-default">
{% for registrant in registrants %}
<tr class="{% cycle odd,even %}">
<th>
<label
{% if registrant.registrant.payment_set.get.type or registrant.registrant.payment_set.get.details %}
{% if not registrant.registrant.payment_set.get.confirmed %}
class="alert"
{% endif %}
{% endif %}
for="id_{{ registrant.registrant.id }}_label">
{{ registrant.registrant.get_full_name }}
</label>
</th>
<td>
{{ field.errors }}
<input id="user_id_{{ registrant.registrant.id }}"
name="registrant_id_{{ registrant.registrant.id }}"
type="checkbox" name="paid"
{% if registrant.registrant.payment_set.get.confirmed %}
checked=checked
{% endif %}
/><br />
</td>
</tr>
{% endfor %}
<tr>
<th>
<button class="button left" type="submit">Submit Payment Status</button>
</th>
</tr>
</table>
</fieldset>
</form>
{% endblock content %}