Hi, I know natural keys possibly will be added to auth.user and group
in 1.4. I'm using 1.2 currently and I'm trying to add them
dynamically:
class UserManager(models.Manager):
def get_by_natural_key(self, username, first_name):
return self.get(username=username, first_name=first_name)
class GroupManager(models.Manager):
def get_by_natural_key(self, name):
return self.get(name=name)
def unatural_key(self):
return (self.username, self.first_name)
def gnatural_key(instance):
return (self.name,)
User.objects = UserManager()
Group.objects = GroupManager()
User.natural_key = unatural_key
Group.natural_key = gnatural_key
It seems like it should work.. (?) but I get this error when trying
to serialize using natural keys:
Traceback (most recent call last):
File "data.py", line 362, in <module>
Backup().main()
File "data.py", line 333, in main
if options.dump : self.do_dump(default_datafile,
self.classes)
File "data.py", line 232, in do_dump
use_natural_keys=True)
File "/usr/local/lib/python2.6/dist-packages/django/core/serializers/
__init__.py", line 87, in serialize
s.serialize(queryset, **options)
File "/usr/local/lib/python2.6/dist-packages/django/core/serializers/
base.py", line 39, in serialize
for obj in queryset:
File "/usr/local/lib/python2.6/dist-packages/django/db/models/
query.py", line 106, in _result_iter
self._fill_cache()
File "/usr/local/lib/python2.6/dist-packages/django/db/models/
query.py", line 760, in _fill_cache
self._result_cache.append(self._iter.next())
File "/usr/local/lib/python2.6/dist-packages/django/db/models/
query.py", line 230, in iterator
fields = self.model._meta.fields
AttributeError: 'NoneType' object has no attribute '_meta'
Is there a way to do this without patching django?
thanks, -ak
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