在 table "django_admin_log" 上插入或更新在管理中保存新模型时违反外键约束

Question

在管理中保存模型的新实例时，我在回溯中得到以下 IntegrityError：

Traceback:

File "/venv/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper
  541.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  57.         response = view_func(request, *args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner
  244.             return view(request, *args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view
  1435.         return self.changeform_view(request, None, form_url, extra_context)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper
  67.             return bound_func(*args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func
  63.                 return func.__get__(self, type(self))(*args2, **kwargs2)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py" in inner
  184.                     return func(*args, **kwargs)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/db/transaction.py" in __exit__
  223.                         connection.commit()

File "/users/dan/project/venv/lib/python2.7/site-packages/django/db/backends/base/base.py" in commit
  242.         self._commit()

File "/users/dan/project/venv/lib/python2.7/site-packages/django/db/backends/base/base.py" in _commit
  211.                 return self.connection.commit()

File "/users/dan/project/venv/lib/python2.7/site-packages/django/db/utils.py" in __exit__
  95.                 six.reraise(dj_exc_type, dj_exc_value, traceback)

File "/users/dan/project/venv/lib/python2.7/site-packages/django/db/backends/base/base.py" in _commit
  211.                 return self.connection.commit()

Exception Type: IntegrityError at /admin/app/invitation/add/
Exception Value: insert or update on table "django_admin_log" violates foreign key constraint "django_admin_log_user_id_52fdd58701c5f563_fk_auth_user_id"
DETAIL:  Key (user_id)=(3) is not present in table "auth_user".

完全相同的代码在另一台机器上运行完美。

Answer 1

看起来我的 Django 用户 table 不知何故变得陈旧并且包含一个过时的主键。不幸的是，运行ning ./manage.py migrate 似乎没有解决任何问题，但是在 old Django trac ticket 的帮助下，我能够弄清楚如何轻松解决这个问题（警告，你会丢失您的管理日志）。

./manage.py migrate admin 0001
echo "DROP TABLE django_admin_log;" | ./manage.py dbshell
./manage.py sqlmigrate admin 0001 | python manage.py dbshell
./manage.py migrate admin

我确定我可以运行在 PostgreSQL 中进行更新以达到同样的效果，但我没有担心要保留的任何数据。

Answer 2

您似乎用另一个用户登录并更改了一些模型。所以您需要退出管理面板，然后重新登录！

这个解决方案对我来说效果很好。

Answer 3

您可以注释掉您更新的模型。并且运行使用以下命令进行迁移：

python manage.py makemigrations app.

现在取消注释模型并再次运行相同的 makemigrations 命令。所有详细信息也将从管理面板中删除。

Answer 4

删除数据库并重新创建它（Postgresql），它将解决问题。

在 table "django_admin_log" 上插入或更新在管理中保存新模型时违反外键约束

Insert or update on table "django_admin_log" violates foreign key constraint when saving new model in admin

python

django

django-admin