My Django 1.7.1 Anwendung läuft gut. Ich würde aber gerne auf die neuere Version 1.8.2 upgraden. Ich folge den AnweisungenHie die sagen im Grunde nur zu tunpip install -U Django aus meiner virtuellen Umgebung.

Nachdem ich diese Zeile gemacht habe, versuche ich sofort,manage.py und es schlägt fehl wie unten gezeigt.

Kann mir jemand vorschlagen, was ich tun soll, um das zu beheben? Die folgenden Fehler scheinen etwas mit dem MPTT-Modul zu tun zu haben. (Ich verwende Version 0.6.1 von MPTT). Upgrade auf eine neuere Version vondjango-mptt kommt auch mit seinen eigenen chaotischen Kopfschmerzen.

(myVirtualEnv) $ ./manage.py
myVirtualEnv/src/django-cache-machine-origin/caching/invalidation.py:21: RemovedInDjango19Warning: 'get_cache' is deprecated in favor of 'caches'.
  cache = get_cache('cache_machine')

myVirtualEnv/lib/python2.7/site-packages/mptt/forms.py:7: RemovedInDjango19Warning: The django.forms.util module has been renamed. Use django.forms.utils instead.
  from django.forms.util import ErrorList

Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "myVirtualEnv/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in     execute_from_command_line
    utility.execute()
  File "myVirtualEnv/lib/python2.7/site-packages/django/core/management/__init__.py", line 312, in execute
    django.setup()
  File "myVirtualEnv/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "myVirtualEnv/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "myVirtualEnv/lib/python2.7/site-packages/django/apps/config.py", line 198, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/local/Cellar/python/2.7.8_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "myProject/myApp1/models.py", line 5, in <module>
    from categories.models import Category
  File "myProject/myApp2/models.py", line 22, in <module>
    class Category(CachingMixin, MPTTModel):
  File "myVirtualEnv/lib/python2.7/site-packages/mptt/models.py", line 244, in __new__
    cls = meta.register(cls)
  File "myVirtualEnv/lib/python2.7/site-packages/mptt/models.py", line 338, in register
    tree_manager.init_from_model(cls)
  File "myVirtualEnv/lib/python2.7/site-packages/mptt/managers.py", line 52, in init_from_model
    [tree_field] = [fld for fld in model._meta.get_fields_with_model() if fld[0].name == self.tree_id_attr]
  File "myVirtualEnv/lib/python2.7/site-packages/django/db/models/options.py", line 56, in wrapper
    return fn(*args, **kwargs)
  File "myVirtualEnv/lib/python2.7/site-packages/django/db/models/options.py", line 432, in get_fields_with_model
    return [self._map_model(f) for f in self.get_fields()]
  File "myVirtualEnv/lib/python2.7/site-packages/django/db/models/options.py", line 740, in get_fields
    return self._get_fields(include_parents=include_parents, include_hidden=include_hidden)
  File "myVirtualEnv/lib/python2.7/site-packages/django/db/models/options.py", line 802, in _get_fields
    all_fields = self._relation_tree
  File "myVirtualEnv/lib/python2.7/site-packages/django/utils/functional.py", line 60, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "myVirtualEnv/lib/python2.7/site-packages/django/db/models/options.py", line 709, in _relation_tree
    return self._populate_directed_relation_graph()
  File "myVirtualEnv/lib/python2.7/site-packages/django/db/models/options.py", line 681, in     _populate_directed_relation_graph
    all_models = self.apps.get_models(include_auto_created=True)
  File "myVirtualEnv/lib/python2.7/site-packages/django/utils/lru_cache.py", line 101, in wrapper
    result = user_function(*args, **kwds)
  File "myVirtualEnv/lib/python2.7/site-packages/django/apps/registry.py", line 168, in get_models
    self.check_models_ready()
  File "myVirtualEnv/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.