Add javascript to submit registration form template to make sure the details are supplied only when user fills in the details.
{% extends "base.html" %}
{% block title %}Edit Talk{% endblock %}
{% block content %}
<h1>Edit Talk</h1>
{% include '_errors.html' %}
<form action="{% url scipycon_edit_talk params.scope id %}" method="post">
<fieldset>
<legend>Edit Talk</legend>
<table class="scipycon-default">
{{ form }}
</table>
<button class="button left" type="submit">Save Changes</button>
</fieldset>
</form>
{% endblock content %}