mysql - 名称错误 : name 'DATABASES' is not defined with AWS RDS

Question

尝试使用 Heroku 应用程序配置 AWS RDS。我以前使用过 postgres，但这是我第一次使用 RDS。我在这里遵循了他们的文档(https://devcenter.heroku.com/articles/amazon_rds)，但是当我尝试运行syncdb或从Heroku访问dbshel​​l时，我收到以下错误:

$ heroku run ./manage.py syncdb
Running `./manage.py syncdb` attached to terminal... up, run.8947
Traceback (most recent call last):
 File "./manage.py", line 10, in <module>
   execute_from_command_line(sys.argv)
 File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 453, in execute_from_command_line
utility.execute()
 File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
 File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 263, in fetch_command
app_name = get_commands()[subcommand]
 File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/__init__.py", line 109, in get_commands
apps = settings.INSTALLED_APPS
 File "/app/.heroku/python/lib/python2.7/site-packages/django/conf/__init__.py", line 53, in __getattr__
self._setup(name)
 File "/app/.heroku/python/lib/python2.7/site-packages/django/conf/__init__.py", line 48, in _setup
self._wrapped = Settings(settings_module)
 File "/app/.heroku/python/lib/python2.7/site-packages/django/conf/__init__.py", line 132, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
 File "/app/.heroku/python/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
__import__(name)
 File "/app/rfp/settings.py", line 33, in <module>
'amazon-rds-ca-cert.pem')}
NameError: name 'DATABASES' is not defined

好的，看来是数据库配置设置问题。这是我的相关设置.py

import os
import sys
import dj_database_url

if DEBUG:
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(PROJECT_ROOT, 'db.sqlite3'),             
    }
}

else:
     dbconfig = dj_database_url.config()

     if dbconfig:
         DATABASES['default']['OPTIONS'] = {
             'ssl': {'ca': os.path.join(os.path.dirname(__file__), 'etc', 'amazon-rds-ca-cert.pem')}
    }  

然后在heroku中我为DATABASE_URL和DEBUG设置了配置变量:

DATABASE_URL:          mysql2://db_user:db_pw@db_server/db?sslca=config/amazon-rds-ca-cert.pem
DEBUG:                 False

.pem 文件位于应用程序根目录的“etc”文件夹中。有人看到我在设置过程中遗漏或配置错误的步骤吗？谢谢

Answer 1

您的主要问题是当DEBUG = False时您从未设置DATABASES。您将变量dbconfig 设置为数据库设置，但从未将其设为默认 数据库。你需要这样的东西:

else:
     dbconfig = dj_database_url.config()

     if dbconfig:
         DATABASES = {'default': dj_database_url.config()} # Add this
         DATABASES['default']['OPTIONS'] = {
             'ssl': {'ca': os.path.join(os.path.dirname(__file__), 'etc', 'amazon-rds-ca-cert.pem')}
    } 

设置默认数据库后，您可以编辑其OPTIONS。

编辑:

此外，无论其值(value)如何，this answer说你不能使用python来构建SSL路径。您需要对其进行硬编码。