forum/models/question.py

   1 from base import *
   2 from tag import Tag
   3 from django.utils.translation import ugettext as _
   4
   5 question_view = django.dispatch.Signal(providing_args=['instance', 'user'])
   6
   7 class Question(Node):
   8     class Meta(Node.Meta):
   9         proxy = True
  10
  11     answer_count = DenormalizedField("children", node_type="answer", deleted=None)
  12     favorite_count = DenormalizedField("actions", action_type="favorite", canceled=False)
  13
  14     friendly_name = _("question")
  15
  16     @property
  17     def closed(self):
  18         return self.extra_action
  19
  20     @property
  21     def view_count(self):
  22         return self.extra_count
  23
  24     @property
  25     def headline(self):
  26         if self.marked:
  27             return _('[closed] ') + self.title
  28
  29         if self.deleted:
  30             return _('[deleted] ') + self.title
  31
  32         return self.title
  33
  34     @property
  35     def answer_accepted(self):
  36         return self.extra_ref is not None
  37
  38     @property
  39     def accepted_answer(self):
  40         return self.extra_ref
  41
  42     @models.permalink
  43     def get_absolute_url(self):
  44         return ('question', (), {'id': self.id, 'slug': django_urlquote(slugify(self.title))})
  45
  46     def get_revision_url(self):
  47         return reverse('question_revisions', args=[self.id])
  48
  49     def get_related_questions(self, count=10):
  50         cache_key = '%s.related_questions:%d:%d' % (settings.APP_URL, count, self.id)
  51         related_list = cache.get(cache_key)
  52
  53         if related_list is None:
  54             related_list = Question.objects.values('id').filter(tags__id__in=[t.id for t in self.tags.all()]
  55             ).exclude(id=self.id).filter(deleted=None).annotate(frequency=models.Count('id')).order_by('-frequency')[:count]
  56             cache.set(cache_key, related_list, 60 * 60)
  57
  58         return [Question.objects.get(id=r['id']) for r in related_list]
  59
  60
  61 def question_viewed(instance, **kwargs):
  62     instance.extra_count += 1
  63     instance.save()
  64
  65 question_view.connect(question_viewed)
  66
  67
  68 class QuestionSubscription(models.Model):
  69     user = models.ForeignKey(User)
  70     question = models.ForeignKey(Node)
  71     auto_subscription = models.BooleanField(default=True)
  72     last_view = models.DateTimeField(default=datetime.datetime.now())
  73
  74     class Meta:
  75         app_label = 'forum'
  76
  77
  78 class QuestionRevision(NodeRevision):
  79     class Meta:
  80         proxy = True
  81