Django Messages and Bootstrap 3

To make Django messages look nice in your bootstrap 3 template you need two things:

1. Create a custom template tag to define css name for a message:

   @register.assignment_tag
   def get_bootstrap_alert_msg_css_name(tags):
       return "danger" if tags == "error" else tags
   

2. Add this snippet to your base.html:

   {% if messages %}
   <ul class="list-unstyled messages">
     {% for message in messages %} {% get_bootstrap_alert_msg_css_name message.tags
     as alert_tag %}
     <li class="alert alert-{{ alert_tag }}">{{ message }}</li>
     {% endfor %}
   </ul>
   {% endif %}