X-Git-Url: https://git.openstreetmap.org./osqa.git/blobdiff_plain/ecd9fa68ea62902f79744b458e4ea2ed95ce00ac..32509c7ba5495ee0b0e42b0343cbd2a6125532cd:/forum/models/tag.py diff --git a/forum/models/tag.py b/forum/models/tag.py index 898c3e1..73b1e30 100644 --- a/forum/models/tag.py +++ b/forum/models/tag.py @@ -1,32 +1,71 @@ +import datetime from base import * +from django.conf import settings as django_settings +from django.core.cache.backends.base import BaseCache from django.utils.translation import ugettext as _ -import django.dispatch +from django.utils.encoding import smart_unicode, force_unicode + +from forum import modules + +class ActiveTagManager(CachedManager): + use_for_related_fields = True -class ActiveTagManager(models.Manager): def get_query_set(self): return super(ActiveTagManager, self).get_query_set().exclude(used_count__lt=1) - class Tag(BaseModel): name = models.CharField(max_length=255, unique=True) created_by = models.ForeignKey(User, related_name='created_tags') + created_at = models.DateTimeField(default=datetime.datetime.now, blank=True, null=True) marked_by = models.ManyToManyField(User, related_name="marked_tags", through="MarkedTag") # Denormalised data used_count = models.PositiveIntegerField(default=0) active = ActiveTagManager() - class Meta: ordering = ('-used_count', 'name') app_label = 'forum' def __unicode__(self): - return self.name + return force_unicode(self.name) + + def add_to_usage_count(self, value): + if self.used_count + value < 0: + self.used_count = 0 + else: + self.used_count = models.F('used_count') + value + + def cache_key(self): + return self._generate_cache_key(Tag.safe_cache_name(self.name)) + + @classmethod + def safe_cache_name(cls, name): + return "".join([str(ord(c)) for c in name]) + + @classmethod + def infer_cache_key(cls, querydict): + if 'name' in querydict: + cache_key = cls._generate_cache_key(cls.safe_cache_name(querydict['name'])) + + if len(cache_key) > django_settings.CACHE_MAX_KEY_LENGTH: + cache_key = cache_key[:django_settings.CACHE_MAX_KEY_LENGTH] + + return cache_key + + return None + + @classmethod + def value_to_list_on_cache_query(cls): + return 'name' + + @models.permalink + def get_absolute_url(self): + return ('tag_questions', (), {'tag': self.name}) class MarkedTag(models.Model): - TAG_MARK_REASONS = (('good',_('interesting')),('bad',_('ignored'))) + TAG_MARK_REASONS = (('good', _('interesting')), ('bad', _('ignored'))) tag = models.ForeignKey(Tag, related_name='user_selections') user = models.ForeignKey(User, related_name='tag_selections') reason = models.CharField(max_length=16, choices=TAG_MARK_REASONS)