小编mad*_*dpx的帖子

我正在 Heroku 应用程序 ( https://devcenter.heroku.com/articles/getting-started-with-python#introduction )上尝试 python 教程，当我在主应用程序上附加 \db 时出现该错误，但它有效与本地主机。

Environment:


Request Method: GET
Request URL: https://<appname>.herokuapp.com/db

Django Version: 1.9.2
Python Version: 2.7.11
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'hello')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware')



Traceback:

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

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

File "/app/hello/views.py" in db
  17.     greeting.save()

File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/base.py" in save
  700.                        force_update=force_update, update_fields=update_fields)

File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/base.py" in save_base …