'Attached' is how I have implemented grouping items.
Problem: it shows group headings when there are no items for that group.
And I don't like the fact that the inner loop spins through all the items for
every outer loop. doesn't scale well.
What I am used to is something like:
today_events = list of detail, order by eventtype.sequence, event.eventdate
eventtype=''
for event in today_events
if event,eventtype !# eventtype
# new group
print event,eventtype.description
eventtype=event,eventtype
print event.title
What is a good way to implement this?
Carl K
# models.py
class EventType(models.Model):
code=models.CharField(maxlength=10) # used in code, so don't change.
description=models.CharField(maxlength=20)
class Meta:
ordering = ('sequence',)
class Event(models.Model):
title = models.CharField(maxlength=47)
eventdate = models.DateField()
detail = models.TextField(blank=True)
eventtype=models.ForeignKey(EventType, null=True)
# views.py
event_types = EventType.objects.all()
today_events = Event.objects.filter(
show_on_main=True,
eventdate = cur_day )
# welcome.html
{% for event_type in event_types %}
<h3>{{event_type.description }}</h3>
{% for event in today_events %}
{% ifequal event.eventtype event_type %}
<li><a href="/eventcal/detail/{{ event.id }}/">{{ event.title }}</a> </li>
{% endifequal %}
{% endfor %}
{% endfor %}
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