在表“django_admin_log”上插入或更新在管理员中保存新模型时违反外键约束 [英] Insert or update on table "django_admin_log" violates foreign key constraint when saving new model in admin

问题描述

 回溯：
在管理员中保存模型的新实例时，我会在追溯中获得以下IntegrityError： 
 
文件/venv/lib/python2.7/site-packages/django/core/handlers/base.pyin get_response 
 149. response = self.process_exception_by_middleware（e，request ）
 
文件/users/dan/project/venv/lib/python2.7/site-packages/django/core/handlers/base.pyin get_response 
 147. response = wrapped_callback（request，* callback_args，** callback_kwargs）
 
文件/users/dan/project/venv/lib/python2.7/site-packages/django/contrib/admin/options.py在包装中
 541. return self.admin_site.admin_view（view）（* args，** kwargs）
 
文件/users/dan/project/venv/lib/python2.7/ _wrapped_view 
中的site-packages / django / utils / decorators.py149. response = view_func（request，* args，** kwargs）
 
文件/ users / dan / project / VENV / LIB / python2.7 / SI _wrapped_view_func 
中的te-packages / django / views / decorators / cache.py57. response = view_func（request，* args，** kwargs）
 
文件/ users / dan /内部
中的项目/ venv / lib / python2.7 / site-packages / django / contrib / admin / sites.py返回视图（request，* args，** kwargs）
 
文件/users/dan/project/venv/lib/python2.7/site-packages/django/contrib/admin/options.pyin add_view 
 1435. return self.changeform_view（request，None， form_url，extra_context）
 
在_wrapper 
中的文件/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py67.返回bound_func（* args，** kwargs）
 
在_wrapped_view $ b中的文件/users/dan/project/venv/lib/python2.7/site-packages/django/utils/decorators.py $ b 149. response = view_func（request，* args，** kwargs）
 
文件/users/dan/project/venv/lib/python2.7/site-packages/django/utils/ decorator.py在bound_func 
 63。 return func .__ get __（self，type（self））（* args2，** kwargs2）
 
文件/users/dan/project/venv/lib/python2.7/site-packages/django /utils/decorators.pyin inner 
 184. return func（* args，** kwargs）
 
文件/users/dan/project/venv/lib/python2.7/ __exit__中的site-packages / django / db / transaction.py
 223. connection.commit（）
 
文件/users/dan/project/venv/lib/python2.7/提交
中的site-packages / django / db / backends / base / base.py242. self._commit（）
 
文件/ users / dan / project / venv / lib / _commit 
中的python2.7 / site-packages / django / db / backends / base / base.py返回self.connection.commit（）
 
文件/ users / dan __exit__中的/project/venv/lib/python2.7/site-packages/django/db/utils.py
 95. six.reraise（dj_exc_type，dj_exc_value，traceback）
 
文件_com中的/users/dan/project/venv/lib/python2.7/site-packages/django/db/backends/base/base.py mit 
 211. return self.connection.commit（）
 
例外类型：IntegrityError at / admin / app / invitation / add / 
异常值：在表上插入或更新 django_admin_log违反外键约束django_admin_log_user_id_52fdd58701c5f563_fk_auth_user_id
 DETAIL：Key（user_id）=（3）不存在于表auth_user中。 
  

完全相同的代码在另一台机器上运行正常。

解决方案

看起来Django用户表不知何故已经过时，包含一个过时的主键。不幸的是，运行 ./ manage.py migrate 似乎没有修复任何东西，但是从老Django trac票，我能够弄清楚如何轻松解决这个问题（警告，你将丢失你的管理员日志）。

  ./ manage.py migrate admin 0001 
 echoDROP TABLE django_admin_log; | ./manage.py dbshel​​l 
 ./manage.py sqlmigrate admin 0001 | python manage.py dbshel​​l 
 ./manage.py migrate admin 
  

我确定我可以在PostgreSQL中运行更新，但效果不错，但我没有保留任何数据。

When saving a new instance of a model in the admin, I get the following IntegrityError in a traceback:

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".

The exact same code works perfectly on another machine.

解决方案

Looks like the Django user table somehow got stale and contained an outdated primary key. Unfortunately, running ./manage.py migrate didn't seem to fix anything, but with a little help from an old Django trac ticket, I was able to figure out how to easily fix this (warning, you will lose your admin logs).

./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

I'm sure I could run an update in PostgreSQL to the same effect, but I didn't have any data I was worried about keeping.

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