# Pastebin OeIjALuj
# Model
class Node(models.Model):
    hostname = models.CharField(max_length=255, unique=True)
#-- CUT FOR BREVITY --
    site = models.ForeignKey(Site, on_delete=models.SET_NULL, null=True)

class Site(models.Model):
    name = models.CharField(max_length=255, unique=True)
#-- CUT FOR BREVITY --

    def __str__(self):
        return self.name


# View
class IndexView(LoginRequiredMixin, generic.ListView):
    template_name = "nodes/index.djhtml"
    context_object_name = 'all_nodes'

    def get_queryset(self):
        return Node.objects.all()

# Template
{% extends 'base/base.djhtml' %}
{% block content %}
#-- CUT FOR BREVITY --
                         {% if all_nodes %}
                            {% regroup all_nodes by site as nodes %}

                            {% for site in nodes %}
                                <h3>site {{ nodes.grouper }}</h3>
                            <table class="table table-bordered table-striped">
                                <thead>
                                    <tr>
                                        <th>#</th>
                                        <th>hostname</th>
                                        <th>driver</th>
                                        <th>group</th>
                                        <th></th>
                                    </tr>
                                </thead>
                                <tbody>
                                    {% for node in nodes.list %}
                                        <tr>
                                            <td>{{ node.id }}</td>
                                            <td>{{ node.hostname }}</td>
                                            <td>{{ node.driver }}</td>
                                            <td>{{ node.group.name }}</td>
                                            <td><a href="{% url 'nodes:detail' pk=node.id %}"><button type="button" class="btn btn-primary btn-xs"><i class="glyphicon glyphicon-eye-open"></i> view</button></a></td>
                                        </tr>
                                    {% endfor %}
                                </tbody>
                            </table>
                            {% endfor %}
                        {% else %}
                            <p>no nodes available</p>
                        {% endif %}
{% endblock %}