Question

There’s a registration button that creates an Attendee for that specific event.(that works). However, upon clicking ‘Register’, the template recognizes 'is_attending'= True(Registered!) for every Event in upcoming.

View:

def index(request):
    upcoming = Event.objects.filter(date__gte=datetime.now())
    if request.user.is_authenticated():
        profile = Profile.objects.get(user=request.user)
    is_attending = False
    for event in upcoming:
        attendees = [a.profile for a in Attendee.objects.filter(event=event)]
        if profile in attendees:
            is_attending = True

template

{% if is_attending %}
     <a><Registered!</a>
{% else %}
     <form>... registration form ... Register Now...

I guess what’s happening is:

event 1  : Registered!
event 2  : Registered!
event 3  : Registered!

When what I need is :

event 1  : Registered!
event 2  : Register Now
event 3  : Register Now

I’m not quite sure why this isn’t working for me? How do I loop through to return is_attending for only those who have registered within upcoming events?

Models:

class Attendee(models.Model):
    event = models.ForeignKey(Event)
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    profile = generic.GenericForeignKey('content_type', 'object_id')

Answer 1

You’re over-writing the value of is_attending every time you go through the for loop; your template sees the (single) value of is_attending as set by whether the last event in upcoming is being attended by request.user.

To get the desired behaviour, one piece of is_attending info for each Event. I think the easiest way to do this is with a custom template tag:

@register.simple_tag(takes_context=True)
def user_is_attending(context, event):
    if type(event) != Event:
        raise template.TemplateSyntaxError("Must provide event")
    request = context['request']
    if event.attendee_set.filter(profile__user=request.user).exists():
        return 'attending'
    else:
        return 'not attending'

Then, while you’re looping over your events in the template:

{% user_is_attending event %}

You could also consider using an assignment tag or an inclusion tag depending on your needs.