配置不正确:settings.DATABASES配置不正确.请提供ENGINE值

Question

我正在heroku上设置我的django项目.我一直在关注文档,但是当foreman start我收到一个我无法弄清楚的错误时.我已经设置了我的引擎文件,但它似乎不想工作.

完全追溯:

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
    utility.execute()
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/core/management/base.py", line 242, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/core/management/base.py", line 285, in execute
    output = self.handle(*args, **options)
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/core/management/base.py", line 415, in handle
    return self.handle_noargs(**options)
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/core/management/commands/syncdb.py", line 57, in handle_noargs
    cursor = connection.cursor()
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/db/backends/__init__.py", line 160, in cursor
    cursor = self.make_debug_cursor(self._cursor())
  File "/Users/nir/nirla/venv/lib/python2.7/site-packages/django/db/backends/dummy/base.py", line 15, in complain
    raise ImproperlyConfigured("settings.DATABASES is improperly configured. "
django.core.exceptions.ImproperlyConfigured: settings.DATABASES is improperly configured. Please supply the ENGINE value. Check settings documentation for more details.

有人建议使用./manage.py diffsettings并显示DATABASES部分:

DATABASES = {'default': {'AUTOCOMMIT': True, 'ENGINE': 'django.db.backends.dummy', 'ATOMIC_REQUESTS': False, 'NAME': '', 'TEST_MIRROR': None, 'CONN_MAX_AGE': 0, 'TEST_NAME': None, 'TIME_ZONE': 'UTC', 'TEST_COLLATION': None, 'PORT': '', 'HOST': '', 'USER': '', 'TEST_CHARSET': None, 'PASSWORD': '', 'OPTIONS': {}}}

我似乎无法弄清楚它意味着什么,但表面看起来并不正确.

以下是我认为可能与此问题相关的settings.py的一部分:

import os
import dj_database_url

ON_HEROKU = os.environ.get('ON_HEROKU')
HEROKU_SERVER = os.environ.get('HEROKU_SERVER')

if ON_HEROKU:

    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.postgresql_psycopg2',
            'NAME': 'postgresql',
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
            'USER': '',
            'PASSWORD': '',
            'HOST': '',                      # Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP.
            'PORT': '',  
        }
    }


DATABASES['default'] =  dj_database_url.config()

SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')

ALLOWED_HOSTS = ['*']

STATIC_URL = '/static/'

# only refers to the location where your static files should end up after running manage.py collectstatic. you shouldn't really need collectstatic) when developing locally
STATIC_ROOT = 'staticfiles'


STATICFILES_DIRS = (    
    os.path.join(BASE_DIR, '../static'),
)

准确解释错误和正在发生的事情的答案将非常有帮助.提前致谢.

Answer 1

您正在使用该dj-database-url模块进行设置DATABASES['default'].无论在线之前是什么:

DATABASES['default'] =  dj_database_url.config()

完全替换数据库配置是没有意义的.在dj_database_url.config()负载从数据库配置DATABASE_URL环境变量,或者返回{}如果变量未设置.

根据您的错误判断,您根本没有设置DATABASE_URL.通过前面的代码来看dj_database_url.config()行,你不应该使用的dj_database_url.config()功能在所有.

如果您确实想要使用它,至少要构建一个默认URL:

if ON_HEROKU:
    DATABASE_URL = 'postgresql:///postgresql'
else:
    DATABASE_URL = 'sqlite://' + os.path.join(BASE_DIR, 'db.sqlite3')

DATABASES = {'default': dj_database_url.config(default=DATABASE_URL)}

Answer 2

您可以对 localhost 使用以下设置

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'DatabaseName',
        'USER': 'DatabaseUserName',
        'PASSWORD': 'DatabaseUserpassword',
        'HOST': 'localhost',
        'PORT': '5432',
    }
}