我正在尝试使用自定义Manager类来限制从模型访问对象时的查询集。但是我想用相关模型中的字段来限制查询集，比如
class MyManager(models.Manager):
def get_queryset(self):
return super(MyManager, self).get_queryset().filter(user__is_active=True)
class MyModel(models.Model):
objects = MyManager()
user = models.OneToOneField(settings.AUTH_USER_MODEL)
但是AppRegistry抱怨说，模型尚未加载，我认为这意味着user中get_queryset的交叉查询，即使django.contrib.auth应用程序正在此应用程序之前加载。发生了什么事？
编辑：回溯（参见user__groups__name=GROUP_MEMBER所示的行）
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute_from_command_line
utility.execute()
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 312, in execute
django.setup()
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
apps.populate(settings.INSTALLED_APPS)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models(all_models)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/apps/config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/vagrant/members_only/base/models.py", line 255, in <module>
from base.settings import PAGE_NAME_TO_VIEW
File "/vagrant/members_only/base/settings.py", line 4, in <module>
from shb.views import *
File "/vagrant/members_only/shb/views.py", line 10, in <module>
from shb.forms import *
File "/vagrant/members_only/shb/forms.py", line 8, in <module>
class SHBForm(forms.ModelForm):
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/forms/models.py", line 285, in __new__
opts.help_texts, opts.error_messages)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/forms/models.py", line 212, in fields_for_model
formfield = f.formfield(**kwargs)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/fields/related.py", line 1970, in formfield
'queryset': self.rel.to._default_manager.using(db),
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/manager.py", line 127, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/vagrant/members_only/roster/models.py", line 51, in get_queryset
user__groups__name=GROUP_MEMBER
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 679, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/query.py", line 697, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1304, in add_q
clause, require_inner = self._add_q(where_part, self.used_aliases)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1332, in _add_q
allow_joins=allow_joins, split_subq=split_subq,
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1144, in build_filter
lookups, parts, reffed_aggregate = self.solve_lookup_type(arg)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1030, in solve_lookup_type
_, field, _, lookup_parts = self.names_to_path(lookup_splitted, self.get_meta())
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1367, in names_to_path
if field.is_relation and not field.related_model:
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/utils/functional.py", line 60, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/db/models/fields/related.py", line 110, in related_model
apps.check_models_ready()
File "/home/vagrant/venv/local/lib/python2.7/site-packages/django/apps/registry.py", line 131, in check_models_ready
raise AppRegistryNotReady("Models aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet.
编辑：SHBForm
class SHBForm(forms.ModelForm):
class Meta:
model = SHB
fields = (
'director', # foreignkey to RosterEntry
...
)
def __init__(self, *args, **kwargs):
super(SHBForm, self).__init__(*args, **kwargs)
self.fields['director'].queryset = RosterEntry.objects.get_all_active_members()
...