如何将 Microsoft azure SQL 服务器连接到 django webapp

Question

我正在开发一个 Django webapp，对于这个应用程序，我想要一个在线数据库。碰巧我的教师授予使用某些 Microsoft Azure 服务的权限，包括 SQL 数据库。现在，我想将 Azure SQL 数据库连接到我的 Django 项目，但是我无法让它工作。我可以通过 PyCharm 的数据源视图连接到数据库，但是在 settings.py 中使用相同的参数会产生此错误：

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x03846270>
Traceback (most recent call last):
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\utils\autoreload.py", line 227, in wrapper
fn(*args, **kwargs)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\management\commands\runserver.py", line 117, in inner_run
autoreload.raise_last_exception()
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\utils\autoreload.py", line 250, in raise_last_exception
six.reraise(*_exception)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\utils\six.py", line 685, in reraise
raise value.with_traceback(tb)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\utils\autoreload.py", line 227, in wrapper
fn(*args, **kwargs)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\__init__.py", line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\apps\registry.py", line 108, in populate
app_config.import_models()
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\apps\config.py", line 202, in import_models
self.models_module = import_module(models_module_name)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 978, in _gcd_import
File "<frozen importlib._bootstrap>", line 961, in _find_and_load
File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\contrib\auth\models.py", line 4, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\contrib\auth\base_user.py", line 52, in <module>
class AbstractBaseUser(models.Model):
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\base.py", line 124, in __new__
new_class.add_to_class('_meta', Options(meta, app_label))
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\base.py", line 330, in add_to_class
value.contribute_to_class(cls, name)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\options.py", line 214, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\__init__.py", line 33, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\utils.py", line 212, in __getitem__
conn = backend.DatabaseWrapper(db, alias)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\sqlserver_ado\base.py", line 184, in __init__
super(DatabaseWrapper, self).__init__(*args, **kwargs)
File "C:\Users\kairy\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\backends\base\base.py", line 96, in __init__
self.client = self.client_class(self)
TypeError: 'NoneType' object is not callable

settings.py 中的 Database 对象如下所示（敏感信息已删除）：

DATABASES = {
    'default': {
        "ENGINE": "sqlserver_ado",
        'NAME': [databasename],
        "HOST": "tcp:[resourcegroup].database.windows.net",
        "PORT": "1433",
        "USER": [username@resourcegroup],
        "PASSWORD": [password]
    }
}

这个配置有什么问题？

Answer 1

根据我的经验，如果您想从 Django webapp 连接 Azure SQL 数据库，最佳实践的简单方法是按照 django-pyodbc-azure README 安装 python 包 pyodbc 和 django-pyodbc-azure 并配置 settings.py正确的Django文件如下。

DATABASES = {
    'default': {
        'ENGINE': 'sql_server.pyodbc',
        'NAME': 'mydb',
        'USER': 'user@myserver',
        'PASSWORD': 'password',
        'HOST': 'myserver.database.windows.net',
        'PORT': '',
        'OPTIONS': {
            'driver': 'ODBC Driver 13 for SQL Server',
        },
    },
}