Django Admin action Intermediate page code template

broadcast_message.html

<!-- my_django_app/templates/admin/broadcast_message.html -->

<!-- This block will be included to django admin basic template -->
{% extends "admin/base_site.html" %}

{% block content %}
<form action="" method="post">{% csrf_token %}
    <!--  The code of the form with all input fields will be automatically generated by Django  -->
    {{ form }}
    <!--  Show the list of selected objects on the previous step  -->
    <p>Broadcast Message will be sent to these users:</p>
    <ul>{{ items|unordered_list }}</ul>
    <!--  Link the action name in hidden params -->
    <input type="hidden" name="action" value="broadcast" />
    <!--  Submit! Apply!  -->
    <input type="submit" name="apply" value="Send" />
</form>
{% endblock %}