forum/models/question.py

   1 from base import *
   2 from tag import Tag
   3 from django.utils.translation import ugettext as _
   4 from forum.modules.decorators import decoratable
   5
   6 question_view = django.dispatch.Signal(providing_args=['instance', 'user'])
   7
   8 class QuestionManager(NodeManager):
   9     @decoratable.method
  10     def search(self, keywords):
  11         return self.filter(models.Q(title__icontains=keywords) | models.Q(body__icontains=keywords))
  12
  13 class Question(Node):
  14     class Meta(Node.Meta):
  15         proxy = True
  16
  17     answer_count = DenormalizedField("children", ~models.Q(state_string__contains="(deleted)"), node_type="answer")
  18     favorite_count = DenormalizedField("actions", action_type="favorite", canceled=False)
  19
  20     friendly_name = _("question")
  21     objects = QuestionManager()
  22
  23     @property
  24     def closed(self):
  25         return self.nis.closed
  26
  27     @property
  28     def view_count(self):
  29         return self.extra_count
  30
  31     @property
  32     def headline(self):
  33         if self.nis.deleted:
  34             return _('[deleted] ') + self.title
  35
  36         if self.nis.closed:
  37             return _('[closed] ') + self.title
  38
  39         return self.title
  40
  41     @property
  42     def answer_accepted(self):
  43         return self.extra_ref is not None
  44
  45     @property
  46     def accepted_answer(self):
  47         return self.extra_ref
  48
  49     @models.permalink
  50     def get_absolute_url(self):
  51         return ('question', (), {'id': self.id, 'slug': django_urlquote(slugify(self.title))})
  52
  53     def get_revision_url(self):
  54         return reverse('question_revisions', args=[self.id])
  55
  56     def get_related_questions(self, count=10):
  57         cache_key = '%s.related_questions:%d:%d' % (settings.APP_URL, count, self.id)
  58         related_list = cache.get(cache_key)
  59
  60         if related_list is None:
  61             related_list = Question.objects.filter_state(deleted=False).values('id').filter(tags__id__in=[t.id for t in self.tags.all()]
  62             ).exclude(id=self.id).annotate(frequency=models.Count('id')).order_by('-frequency')[:count]
  63             cache.set(cache_key, related_list, 60 * 60)
  64
  65         return [Question.objects.get(id=r['id']) for r in related_list]
  66
  67
  68 def question_viewed(instance, **kwargs):
  69     instance.extra_count += 1
  70     instance.save()
  71
  72 question_view.connect(question_viewed)
  73
  74
  75 class QuestionSubscription(models.Model):
  76     user = models.ForeignKey(User)
  77     question = models.ForeignKey(Node)
  78     auto_subscription = models.BooleanField(default=True)
  79     last_view = models.DateTimeField(default=datetime.datetime.now())
  80
  81     class Meta:
  82         app_label = 'forum'
  83
  84
  85 class QuestionRevision(NodeRevision):
  86     class Meta:
  87         proxy = True
  88