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 QuestionManager(NodeManager):
   8     def search(self, keywords):
   9         return False, self.filter(models.Q(title__icontains=keywords) | models.Q(body__icontains=keywords))
  10
  11 class Question(Node):
  12     class Meta(Node.Meta):
  13         proxy = True
  14
  15     answer_count = DenormalizedField("children", ~models.Q(state_string__contains="(deleted)"), node_type="answer")
  16     accepted_count = DenormalizedField("children", ~models.Q(state_string__contains="(deleted)"), node_type="answer", marked=True)
  17     favorite_count = DenormalizedField("actions", action_type="favorite", canceled=False)
  18
  19     friendly_name = _("question")
  20     objects = QuestionManager()
  21
  22     @property
  23     def closed(self):
  24         return self.nis.closed
  25
  26     @property
  27     def view_count(self):
  28         return self.extra_count
  29
  30     @property
  31     def headline(self):
  32         if self.nis.deleted:
  33             return _('[deleted] ') + self.title
  34
  35         if self.nis.closed:
  36             return _('[closed] ') + self.title
  37
  38         return self.title
  39
  40     @property
  41     def accepted_answers(self):
  42         return self.answers.filter(~models.Q(state_string__contains="(deleted)"), marked=True)
  43
  44     @models.permalink
  45     def get_absolute_url(self):
  46         return ('question', (), {'id': self.id, 'slug': django_urlquote(slugify(self.title))})
  47
  48     def meta_description(self):
  49         return self.summary
  50
  51     def get_revision_url(self):
  52         return reverse('question_revisions', args=[self.id])
  53
  54     def get_related_questions(self, count=10):
  55         cache_key = '%s.related_questions:%d:%d' % (settings.APP_URL, count, self.id)
  56         related_list = cache.get(cache_key)
  57
  58         if related_list is None:
  59             related_list = Question.objects.filter_state(deleted=False).values('id').filter(tags__id__in=[t.id for t in self.tags.all()]
  60             ).exclude(id=self.id).annotate(frequency=models.Count('id')).order_by('-frequency')[:count]
  61             cache.set(cache_key, related_list, 60 * 60)
  62
  63         return [Question.objects.get(id=r['id']) for r in related_list]
  64
  65
  66 def question_viewed(instance, **kwargs):
  67     instance.extra_count += 1
  68     instance.save()
  69
  70 question_view.connect(question_viewed)
  71
  72
  73 class QuestionSubscription(models.Model):
  74     user = models.ForeignKey(User)
  75     question = models.ForeignKey(Node)
  76     auto_subscription = models.BooleanField(default=True)
  77     last_view = models.DateTimeField(default=datetime.datetime.now())
  78
  79     class Meta:
  80         app_label = 'forum'
  81
  82
  83 class QuestionRevision(NodeRevision):
  84     class Meta:
  85         proxy = True
  86