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from django.db import models
from django.contrib.auth.models import User
from django.urls import reverse
import datetime
def closed_date_default():
return datetime.datetime.now() + datetime.timedelta(days=90)
class PollManager(models.Manager):
def open(self):
return self.all().exclude(closed_date__lte=datetime.datetime.now())
class Poll(models.Model):
name = models.CharField(max_length=256)
pub_date = models.DateTimeField(
'date published', default=datetime.datetime.now)
closed_date = models.DateTimeField('date closed', default=closed_date_default,
blank=True, null=True)
objects = PollManager()
def total_votes(self):
return self.choices.all().aggregate(models.Sum('votes'))['votes__sum']
def has_user_voted(self, u):
return u.poll_votes.filter(poll=self).count() > 0
def is_closed(self):
if self.closed_date is None:
return False
return self.closed_date < datetime.datetime.now()
def get_absolute_url(self):
return reverse('wlpoll_detail', kwargs={'pk': self.id})
def __unicode__(self):
return self.name
class Choice(models.Model):
poll = models.ForeignKey(Poll, related_name='choices')
choice = models.CharField(max_length=256)
votes = models.PositiveIntegerField(default=0)
def __unicode__(self):
return u"%i:%s" % (self.votes, self.choice)
class Vote(models.Model):
user = models.ForeignKey(User, related_name='poll_votes')
poll = models.ForeignKey(Poll)
choice = models.ForeignKey(Choice)
date_voted = models.DateTimeField(
'voted at', default=datetime.datetime.now)
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