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annotate contests/models.py @ 821:71db8076dc3d

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Bandmap WIP: geocoding integrated with add form. Add form works. Before submitting the form, client side JS makes a geocode request to Google and populates hidden lat/lon fields with the result. Successfully created a model instance on the server side. Still need to update admin dashboard, admin approval, and give out badges for adding bands to the map. Once that is done, then work on displaying the map with filtering.
author Brian Neal <bgneal@gmail.com>
date Tue, 23 Sep 2014 20:40:31 -0500
parents 5977b43499f7
children 21946dc3662d
rev   line source
bgneal@540 1 """
bgneal@540 2 Models for the contest application.
bgneal@540 3
bgneal@540 4 """
bgneal@540 5 import random
bgneal@540 6 import datetime
bgneal@540 7
bgneal@540 8 from django.db import models
bgneal@540 9 from django.contrib.auth.models import User
bgneal@540 10
bgneal@540 11
bgneal@540 12 class PublicContestManager(models.Manager):
bgneal@540 13 """
bgneal@540 14 The manager for all public contests.
bgneal@540 15
bgneal@540 16 """
bgneal@740 17 def get_queryset(self):
bgneal@740 18 return super(PublicContestManager, self).get_queryset().filter(is_public=True)
bgneal@540 19
bgneal@788 20 def get_current_contests(self):
bgneal@788 21 now = datetime.datetime.now()
bgneal@788 22 return self.filter(creation_date__lte=now, win_date__isnull=True)
bgneal@788 23
bgneal@540 24
bgneal@540 25 class Contest(models.Model):
bgneal@540 26 """
bgneal@540 27 A model to represent contests where users sign up to win something.
bgneal@540 28
bgneal@540 29 """
bgneal@540 30 title = models.CharField(max_length=64)
bgneal@540 31 slug = models.SlugField(max_length=64)
bgneal@540 32 description = models.TextField()
bgneal@540 33 is_public = models.BooleanField(db_index=True)
bgneal@540 34 creation_date = models.DateTimeField(blank=True)
bgneal@540 35 end_date = models.DateTimeField()
bgneal@540 36 contestants = models.ManyToManyField(User, related_name='contests',
bgneal@540 37 null=True, blank=True)
bgneal@796 38 winners = models.ManyToManyField(User, null=True, blank=True,
bgneal@540 39 related_name='winning_contests')
bgneal@540 40 win_date = models.DateTimeField(null=True, blank=True)
bgneal@540 41 meta_description = models.TextField()
bgneal@796 42 num_winners = models.IntegerField(default=1,
bgneal@796 43 verbose_name='Number of winners')
bgneal@540 44
bgneal@540 45 objects = models.Manager()
bgneal@540 46 public_objects = PublicContestManager()
bgneal@540 47
bgneal@540 48 class Meta:
bgneal@540 49 ordering = ['-creation_date']
bgneal@540 50
bgneal@540 51 def __unicode__(self):
bgneal@540 52 return self.title
bgneal@540 53
bgneal@540 54 @models.permalink
bgneal@540 55 def get_absolute_url(self):
bgneal@540 56 return ('contests-contest', [], {'slug': self.slug})
bgneal@540 57
bgneal@540 58 def save(self, *args, **kwargs):
bgneal@540 59 if not self.pk and not self.creation_date:
bgneal@540 60 self.creation_date = datetime.datetime.now()
bgneal@540 61
bgneal@540 62 super(Contest, self).save(*args, **kwargs)
bgneal@540 63
bgneal@540 64 def is_active(self):
bgneal@540 65 """
bgneal@540 66 Returns True if the contest is still active.
bgneal@540 67
bgneal@540 68 """
bgneal@540 69 now = datetime.datetime.now()
bgneal@540 70 return self.creation_date <= now < self.end_date
bgneal@540 71
bgneal@540 72 def can_enter(self):
bgneal@540 73 """
bgneal@796 74 Returns True if the contest is still active and does not have any
bgneal@796 75 winners.
bgneal@540 76
bgneal@540 77 """
bgneal@796 78 return not self.win_date and self.is_active()
bgneal@540 79
bgneal@796 80 def pick_winners(self):
bgneal@540 81 """
bgneal@796 82 This function randomly picks winners from all the contestants.
bgneal@540 83
bgneal@540 84 """
bgneal@796 85 user_ids = list(self.contestants.values_list('id', flat=True))
bgneal@796 86
bgneal@796 87 winner_count = min(len(user_ids), self.num_winners)
bgneal@796 88 if winner_count == 0:
bgneal@796 89 return
bgneal@796 90
bgneal@796 91 winner_ids = []
bgneal@796 92 for n in xrange(winner_count):
bgneal@796 93 winner = random.choice(user_ids)
bgneal@796 94 winner_ids.append(winner)
bgneal@796 95 user_ids.remove(winner)
bgneal@796 96
bgneal@796 97 winners = list(User.objects.filter(pk__in=winner_ids))
bgneal@796 98 self.winners.add(*winners)
bgneal@540 99 self.win_date = datetime.datetime.now()
bgneal@540 100
bgneal@540 101 def ogp_tags(self):
bgneal@540 102 """
bgneal@540 103 Returns a dict of Open Graph Protocol meta tags.
bgneal@540 104
bgneal@540 105 """
bgneal@540 106 return {
bgneal@540 107 'og:title': self.title,
bgneal@567 108 'og:type': 'article',
bgneal@540 109 'og:url': self.get_absolute_url(),
bgneal@540 110 'og:description': self.meta_description,
bgneal@540 111 }