Python-сообщество

class task(models.Model):
    name = models.CharField(max_length = 100)

class day(models.Model):
    task = models.ForeignKey(task)
    index = models.DateField()

class event(models.Model):
    day = models.ForeignKey(day)
    priority = models.IntegerField()
    descriprion = models.CharField(max_length = 200)

{% for t in task %}
{{ t.name }}
{% for d in t.day_set.all %}
{% for e in d.event_set.all|dictsort:"priority" %}
{% ifchanged e.priority %}
{{ e.priority }}
{% endifchanged %}
{% endfor %}
{% endfor %}
{% endfor %}

def get_priority(self):
	priority_list = []
	tmp_priority = None
	for day in self.day_set.all():
		for event in day.event_set.all():
			priority = content.priority
			if tmp_priority != priority:
				tmp_priority = priority
				priority_list.append(priority)
			else: pass
	return priority_list