Mongo + Postgres + Django 测试错误 - 多数据库 (Django-MongoDB-Engine)

Question

我一直在尝试让我的Django测试正常工作，因为我正在构建一个API。我对Python还比较陌生，所以在这方面卡了很久。

这里有一些简单的情况：

我使用了两个数据库——一个是PostgreSQL数据库用来存储用户信息，另一个是MongoDB用来存储其他所有数据。
我使用了TastyPie、Django-MongoDB-Engine、Djangotoolbox、Django-Non-rel、Pymongo和psycopg2这些工具。
我已经成功连接了这两个数据库。当我在命令行中保存一个auth_user时，它会保存到SQL数据库，而我应用中的模型则会保存到MongoDB。

我需要把这个和另一个API整合在一起，所以在选择数据库和库的时候受到了限制。

我最大的问题就是测试——我无法让它正常工作。

每当我尝试用命令./manage.py test运行Django的测试时，总是出现这个错误：

pymongo.errors.OperationFailure: command SON([('authenticate', 1), ('user', u'test'), ('nonce', u'blahblah'), ('key', u'blahblah')]) failed: auth fails

经过大量搜索，我仍然不确定问题出在哪里。我知道显然是有东西在尝试与我的MongoDB进行身份验证，但它没有成功。我不介意使用这个数据库进行测试，反正它就是一个测试数据库。

请帮帮我！我的配置和错误信息在下面。

我设置了数据库配置，包括了两个数据库，如下所示：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'main_db',
        'USER': os.environ['RDS_USERNAME'],
        'PASSWORD': os.environ['RDS_PASSWORD'],
        'HOST': os.environ['RDS_HOSTNAME'],
        'PORT': os.environ['RDS_PORT'],
    },
    'mongo': {
        'ENGINE': 'django_mongodb_engine',
        'NAME': 'mongo_db',
        'USER': os.environ['MONGO_USERNAME'],
        'PASSWORD': os.environ['MONGO_PASSWORD'],
        'HOST': os.environ['MONGO_HOSTNAME'],
        'PORT': os.environ['MONGO_PORT'],
    }
}

DATABASE_ROUTERS = ['myproject.database_router.AuthRouter']

正如你所看到的，我创建了自己的自定义路由：

sql_databases = ['admin', 'auth', 'contenttypes', 'tastypie'
                 'sessions', 'messages', 'staticfiles']


class AuthRouter(object):
    """
    A router to control all database operations on models in the
    auth application.
    """
    def db_for_read(self, model, **hints):
        """
        Attempts to read auth models go to auth_db.
        """
        if model._meta.app_label in sql_databases:
            return 'default'
        return 'mongo'

    def db_for_write(self, model, **hints):
        """
        Attempts to write auth models go to auth_db.
        """
        if model._meta.app_label in sql_databases:
            return 'default'
        return 'mongo'

    def allow_relation(self, obj1, obj2, **hints):
        """
        Allow relations only if model does includes auth app.
        """
        if obj1._meta.app_label in sql_databases or \
           obj2._meta.app_label in sql_databases:
                return True
        return False

    def allow_migrate(self, db, model):
        """
        Make sure the auth app only appears in the 'auth_db'
        database.
        """
        if db == 'default':
            return model._meta.app_label in sql_databases
        elif model._meta.app_label in sql_databases:
            return False
        return False

完整的错误追踪信息在这里：

Traceback (most recent call last):
File "./manage.py", line 10, in <module>
  execute_from_command_line(sys.argv)
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
  utility.execute()
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/__init__.py", line 392, in execute
  self.fetch_command(subcommand).run_from_argv(self.argv)
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/commands/test.py", line 50, in run_from_argv
  super(Command, self).run_from_argv(argv)
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/base.py", line 242, in run_from_argv
  self.execute(*args, **options.__dict__)
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/commands/test.py", line 71, in execute
  super(Command, self).execute(*args, **options)
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/base.py", line 285, in execute
  output = self.handle(*args, **options)
File "myproject/djenv/lib/python2.7/site-packages/django/core/management/commands/test.py", line 88, in handle
  failures = test_runner.run_tests(test_labels)
File "myproject/djenv/lib/python2.7/site-packages/django/test/runner.py", line 145, in run_tests
  old_config = self.setup_databases()
File "myproject/djenv/lib/python2.7/site-packages/django/test/runner.py", line 107, in setup_databases
  return setup_databases(self.verbosity, self.interactive, **kwargs)
File "myproject/djenv/lib/python2.7/site-packages/django/test/runner.py", line 279, in setup_databases
  verbosity, autoclobber=not interactive)
File "myproject/djenv/lib/python2.7/site-packages/django_mongodb_engine/creation.py", line 196, in create_test_db
  self.connection._reconnect()
File "myproject/djenv/lib/python2.7/site-packages/django_mongodb_engine/base.py", line 279, in _reconnect
  self._connect()
File "myproject/djenv/lib/python2.7/site-packages/django_mongodb_engine/base.py", line 268, in _connect
  if not self.database.authenticate(user, password):
File "myproject/djenv/lib/python2.7/site-packages/pymongo/database.py", line 891, in authenticate
  self.connection._cache_credentials(self.name, credentials)
File "myproject/djenv/lib/python2.7/site-packages/pymongo/mongo_client.py", line 459, in _cache_credentials
  auth.authenticate(credentials, sock_info, self.__simple_command)
File "myproject/djenv/lib/python2.7/site-packages/pymongo/auth.py", line 243, in authenticate
  auth_func(credentials[1:], sock_info, cmd_func)
File "myproject/djenv/lib/python2.7/site-packages/pymongo/auth.py", line 222, in _authenticate_mongo_cr
  cmd_func(sock_info, source, query)
File "myproject/djenv/lib/python2.7/site-packages/pymongo/mongo_client.py", line 690, in __simple_command
  helpers._check_command_response(response, None, msg)
File "myproject/djenv/lib/python2.7/site-packages/pymongo/helpers.py", line 178, in _check_command_response
  raise OperationFailure(msg % errmsg, code, response)
pymongo.errors.OperationFailure: command SON([('authenticate', 1), ('user', u'test'), ('nonce', u'blahblah'), ('key', u'blahblah')]) failed: auth fails

任何帮助都非常感谢！

django pymongo mongodb postgresql api testing djangotoolbox tastypie

Mongo + Postgres + Django 测试错误 - 多数据库 (Django-MongoDB-Engine)

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