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import datetime
from django.db import models
from django.contrib.auth.models import User
class BaseQuerySetManager(models.Manager):
"""a base class that allows chainable qustom filters
on the query sets
pattern from http://djangosnippets.org/snippets/562/
Usage (the most basic example, all imports explicit for clarity):
>>>import django.db.models.QuerySet
>>>import django.db.models.Model
>>>import askbot.models.base.BaseQuerySetManager
>>>
>>>class SomeQuerySet(django.db.models.QuerySet):
>>> def some_custom_filter(self, *args, **kwargs):
>>> return self #or any custom code
>>> #add more custom filters here
>>>
>>>class SomeManager(askbot.models.base.BaseQuerySetManager)
>>> def get_query_set(self):
>>> return SomeQuerySet(self.model)
>>>
>>>class SomeModel(django.db.models.Model)
>>> #add fields here
>>> objects = SomeManager()
"""
def __getattr__(self, attr, *args):
## The following two lines fix the problem from this ticket:
## https://code.djangoproject.com/ticket/15062#comment:6
## https://code.djangoproject.com/changeset/15220
## Queryset.only() seems to suffer from that on some occasions
if attr.startswith('_'):
raise AttributeError
##
try:
return getattr(self.__class__, attr, *args)
except AttributeError:
return getattr(self.get_query_set(), attr, *args)
class DraftContent(models.Model):
"""Base class for AnonymousQuestion and AnonymousAnswer"""
session_key = models.CharField(max_length=40) #session id for anonymous questions
wiki = models.BooleanField(default=False)
added_at = models.DateTimeField(default=datetime.datetime.now)
ip_addr = models.IPAddressField(max_length=21) #allow high port numbers
author = models.ForeignKey(User,null=True)
text = models.TextField()
class Meta:
abstract = True
app_label = 'askbot'
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