import datetime
+import re
from urllib import quote_plus, urlencode
from django.db import models, IntegrityError, connection, transaction
from django.utils.http import urlquote as django_urlquote
from django.utils.safestring import mark_safe
from django.contrib.sitemaps import ping_google
import django.dispatch
-from django.conf import settings
-from forum import const
+from forum import settings
import logging
-from forum.const import *
+
+class LazyQueryList(object):
+ def __init__(self, model, items):
+ self.model = model
+ self.items = items
+
+ def __getitem__(self, k):
+ return self.model.objects.get(id=self.items[k])
+
+ def __iter__(self):
+ for id in self.items:
+ yield self.model.objects.get(id=id)
+
+ def __len__(self):
+ return len(self.items)
+
+class CachedQuerySet(models.query.QuerySet):
+ def lazy(self):
+ if len(self.query.extra) == 0:
+ return LazyQueryList(self.model, list(self.values_list('id', flat=True)))
+ else:
+ return self
+
+from action import Action
class CachedManager(models.Manager):
use_for_related_fields = True
+ int_cache_re = re.compile('^_[\w_]+cache$')
+
+ def get_query_set(self):
+ return CachedQuerySet(self.model)
+
+ def cache_obj(self, obj):
+ int_cache_keys = [k for k in obj.__dict__.keys() if self.int_cache_re.match(k)]
+ d = obj.__dict__
+ for k in int_cache_keys:
+ if not isinstance(obj.__dict__[k], Action):
+ del obj.__dict__[k]
+
+ cache.set(self.model.cache_key(obj.id), obj, 60 * 60)
def get(self, *args, **kwargs):
try:
- pk = [v for (k,v) in kwargs.items() if k in ('pk', 'pk__exact', 'id', 'id__exact') or k.endswith('_ptr__pk')][0]
+ pk = [v for (k,v) in kwargs.items() if k in ('pk', 'pk__exact', 'id', 'id__exact'
+ ) or k.endswith('_ptr__pk') or k.endswith('_ptr__id')][0]
except:
pk = None
if obj is None:
obj = super(CachedManager, self).get(*args, **kwargs)
- cache.set(key, obj, 60 * 60)
+ self.cache_obj(obj)
+ else:
+ d = obj.__dict__
return obj
return super(CachedManager, self).get_or_create(*args, **kwargs)
+class DenormalizedField(object):
+ def __init__(self, manager, **kwargs):
+ self.manager = manager
+ self.filter = kwargs
+
+ def setup_class(self, cls, name):
+ dict_name = '_%s_cache_' % name
+
+ def getter(inst):
+ val = inst.__dict__.get(dict_name, None)
+
+ if val is None:
+ val = getattr(inst, self.manager).filter(**self.filter).count()
+ inst.__dict__[dict_name] = val
+ inst.__class__.objects.cache_obj(inst)
+
+ return val
+
+ def reset_cache(inst):
+ inst.__dict__.pop(dict_name, None)
+ inst.__class__.objects.cache_obj(inst)
+
+ cls.add_to_class(name, property(getter))
+ cls.add_to_class("reset_%s_cache" % name, reset_cache)
+
+
+class BaseMetaClass(models.Model.__metaclass__):
+ to_denormalize = []
+
+ def __new__(cls, *args, **kwargs):
+ new_cls = super(BaseMetaClass, cls).__new__(cls, *args, **kwargs)
+
+ BaseMetaClass.to_denormalize.extend(
+ [(new_cls, name, field) for name, field in new_cls.__dict__.items() if isinstance(field, DenormalizedField)]
+ )
+
+ return new_cls
+
+ @classmethod
+ def setup_denormalizes(cls):
+ for new_cls, name, field in BaseMetaClass.to_denormalize:
+ field.setup_class(new_cls, name)
+
+
class BaseModel(models.Model):
+ __metaclass__ = BaseMetaClass
+
objects = CachedManager()
class Meta:
if self._original_state.get(k, missing) == missing or self._original_state[k] != v])
def save(self, *args, **kwargs):
- super(BaseModel, self).save(*args, **kwargs)
+ put_back = [k for k, v in self.__dict__.items() if isinstance(v, models.expressions.ExpressionNode)]
+ super(BaseModel, self).save()
+
+ if put_back:
+ try:
+ self.__dict__.update(
+ self.__class__.objects.filter(id=self.id).values(*put_back)[0]
+ )
+ except:
+ logging.error("Unable to read %s from %s" % (", ".join(put_back), self.__class__.__name__))
+ self.uncache()
+
self._original_state = dict(self.__dict__)
- cache.set(self.cache_key(self.pk), self, 86400)
+ self.cache()
- def delete(self):
+ def cache(self):
+ self.__class__.objects.cache_obj(self)
+
+ def uncache(self):
cache.delete(self.cache_key(self.pk))
+
+ def delete(self):
+ self.uncache()
super(BaseModel, self).delete()
def get_query_set(self):
return super(UndeletedObjectManager, self).get_query_set().filter(deleted=False)
-class GenericContent(BaseModel):
- """
- Base class for Vote, Comment and FlaggedItem
- """
+class GenericContent(models.Model):
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = generic.GenericForeignKey('content_type', 'object_id')
app_label = 'forum'
-marked_deleted = django.dispatch.Signal(providing_args=["instance", "deleted_by"])
-
class DeletableContent(models.Model):
deleted = models.BooleanField(default=False)
deleted_at = models.DateTimeField(null=True, blank=True)
self.deleted_at = datetime.datetime.now()
self.deleted_by = user
self.save()
- marked_deleted.send(sender=self.__class__, instance=self, deleted_by=user)
return True
else:
return False
from node import Node, NodeRevision
-class QandA(Node):
- wiki = models.BooleanField(default=False)
- wikified_at = models.DateTimeField(null=True, blank=True)
-
- class Meta:
- abstract = True
- app_label = 'forum'
-
- def wikify(self):
- if not self.wiki:
- self.wiki = True
- self.wikified_at = datetime.datetime.now()
- self.save()
projects / osqa.git / blobdiff