Python Django : RuntimeError: Model class django. contrib.sites.models.Site(错误继续)

我目前正在使用 Python Django 编写一个网络应用程序。 我的问题是，我最近安装了 django-relationships， 将它添加到 settings.py 中我的 INSTALLED_APPS。

从那时起我就收到了这个有线错误，我不知道它是什么意思。

有人可以帮助我吗？

Unhandled exception in thread started by <function wrapper at 0x10c6fdcf8> 
Traceback (most recent call last): 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/utils/autoreload.py", line 226, in wrapper 
    fn(*args, **kwargs) 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/core/management/commands/runserver.py", line 109, in inner_run 
    autoreload.raise_last_exception() 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/utils/autoreload.py", line 249, in raise_last_exception 
    six.reraise(*_exception) 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/utils/autoreload.py", line 226, in wrapper 
    fn(*args, **kwargs) 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site-packages/django/__init__.py",  
line 18, in setup 
    apps.populate(settings.INSTALLED_APPS) 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/apps/registry.py", line 108, in populate 
    app_config.import_models(all_models) 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/apps/config.py", line 202, in import_models 
    self.models_module = import_module(models_module_name) 
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module 
    __import__(name) 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/relationships/models.py", line 3, in <module> 
    from django.contrib.sites.models import Site 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/contrib/sites/models.py", line 83, in <module> 
    class Site(models.Model): 
  File "/Users/Maximilian_H/Documents/SkyPixelServernetzwerk/Coding-Projects/Website/lib/python2.7/site- 
packages/django/db/models/base.py", line 102, in __new__ 
    "INSTALLED_APPS." % (module, name) 
RuntimeError: Model class django.contrib.sites.models.Site doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS. 

请您参考如下方法:

似乎 django-relationships 依赖于 Site 模型。您还必须将 django.contrib.sites 添加到您的 INSTALLED_APPS。

第二个错误表明 django-relationships 试图从 django.db.models.fields.related 导入 create_many_related_manager。这个函数在 Django 1.9 中被移除了。如果有更新的版本可用，您可以尝试是否可行。如果不是，django-relationships 不能用于 Django 1.9。