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