Question

使用Django 2.0.5，我在管理面板中遇到了问题。通过管理面板添加或保存数据会出现“ django.db.utils.IntegrityError：FOREIGN KEY约束失败”错误。在模型中，没有可引用的外键。

models.py

class JobTitle(models.Model):
    job_title = models.CharField(max_length=200)

admin.py

class JobTitleAdmin(admin.ModelAdmin):
    list_display = ['job_title',]
admin.site.register(JobTitle, JobTitleAdmin)

使用前端的PUSH添加相同的数据是可行的，只有在管理面板中才会出现此错误。

编辑：

Environment:


Request Method: POST
Request URL: http://localhost:8000/admin/login_app/locations/add/

Django Version: 2.0.5
Python Version: 3.6.4
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'rest_framework.authtoken',
 'login_app',
 'corsheaders',
 'rest_auth']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'corsheaders.middleware.CorsMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback:

File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py" in _commit
  239.                 return self.connection.commit()

The above exception (FOREIGN KEY constraint failed) was the direct cause of the following exception:

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  35.             response = get_response(request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  128.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  126.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/usr/local/lib/python3.6/site-packages/django/contrib/admin/options.py" in wrapper
  574.                 return self.admin_site.admin_view(view)(*args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view
  142.                     response = view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  44.         response = view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/contrib/admin/sites.py" in inner
  223.             return view(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/contrib/admin/options.py" in add_view
  1553.         return self.changeform_view(request, None, form_url, extra_context)

File "/usr/local/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapper
  62.             return bound_func(*args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view
  142.                     response = view_func(request, *args, **kwargs)

File "/usr/local/lib/python3.6/site-packages/django/utils/decorators.py" in bound_func
  58.                 return func.__get__(self, type(self))(*args2, **kwargs2)

File "/usr/local/lib/python3.6/site-packages/django/contrib/admin/options.py" in changeform_view
  1450.             return self._changeform_view(request, object_id, form_url, extra_context)

File "/usr/local/lib/python3.6/site-packages/django/db/transaction.py" in __exit__
  212.                         connection.commit()

File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py" in commit
  261.         self._commit()

File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py" in _commit
  239.                 return self.connection.commit()

File "/usr/local/lib/python3.6/site-packages/django/db/utils.py" in __exit__
  89.                 raise dj_exc_value.with_traceback(traceback) from exc_value

File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py" in _commit
  239.                 return self.connection.commit()

Exception Type: IntegrityError at /admin/login_app/locations/add/
Exception Value: FOREIGN KEY constraint failed

Answer 1

AFAIK管理界面还提供了某种历史跟踪功能（例如，保存对象的时间）。

由于FK错误似乎没有从代码中弹出（基于跟踪），因此我认为您需要（重新）运行manage.py migrate（甚至是makemigrations）来更新您的代码数据库布局。

外键约束失败

1 个答案: