forum/models/tag.py

   1 import datetime
   2 from base import *
   3
   4 from forum.modules import MODULES_PACKAGE
   5
   6 from django.utils.translation import ugettext as _
   7 import django.dispatch
   8
   9 class ActiveTagManager(models.Manager):
  10     def get_query_set(self):
  11         qs = super(ActiveTagManager, self).get_query_set().exclude(used_count__lt=1)
  12
  13         CurrentUserHolder = None
  14
  15         moderation_import = 'from %s.moderation.startup import CurrentUserHolder' % MODULES_PACKAGE
  16         exec moderation_import
  17
  18         if CurrentUserHolder is not None:
  19             user = CurrentUserHolder.user
  20
  21             try:
  22                 filter_content = not user.is_staff and not user.is_superuser
  23             except:
  24                 filter_content = True
  25
  26             if filter_content:
  27                 moderation_import = 'from %s.moderation.hooks import get_tag_ids' % MODULES_PACKAGE
  28                 exec moderation_import
  29                 qs = qs.exclude(id__in=get_tag_ids('deleted')).exclude(id__in=get_tag_ids('rejected')).exclude(
  30                     id__in=get_tag_ids('in_moderation')
  31                 )
  32
  33         return qs
  34
  35 class Tag(BaseModel):
  36     name            = models.CharField(max_length=255, unique=True)
  37     created_by      = models.ForeignKey(User, related_name='created_tags')
  38     created_at      = models.DateTimeField(default=datetime.datetime.now, blank=True, null=True)
  39     marked_by       = models.ManyToManyField(User, related_name="marked_tags", through="MarkedTag")
  40     # Denormalised data
  41     used_count = models.PositiveIntegerField(default=0)
  42
  43     active = ActiveTagManager()
  44     objects = ActiveTagManager()
  45
  46     class Meta:
  47         ordering = ('-used_count', 'name')
  48         app_label = 'forum'
  49
  50     def __unicode__(self):
  51         return u'%s' % self.name
  52
  53     def add_to_usage_count(self, value):
  54         if self.used_count + value < 0:
  55             self.used_count = 0
  56         else:
  57             self.used_count = models.F('used_count') + value
  58
  59     @models.permalink
  60     def get_absolute_url(self):
  61         return ('tag_questions', (), {'tag': self.name})
  62
  63 class MarkedTag(models.Model):
  64     TAG_MARK_REASONS = (('good', _('interesting')), ('bad', _('ignored')))
  65     tag = models.ForeignKey(Tag, related_name='user_selections')
  66     user = models.ForeignKey(User, related_name='tag_selections')
  67     reason = models.CharField(max_length=16, choices=TAG_MARK_REASONS)
  68
  69     class Meta:
  70         app_label = 'forum'
  71