在Django 1.11中使用MySQL连接器/Python时出错

Question

我已经在cmd中通过以下命令创建了Django项目：

django-admin.py startproject database

然后编辑settings.py，如下所示：

DATABASES = {
    'default': {
        'ENGINE':'mysql.connector.django',
        'NAME' : 'music',
        'USER':'python',
        'PASSWORD':'123654789',
        'HOST':'127.0.0.2',
        'OPTIONS':{
            'automatic':True,
        }
    }
 }

运行python manage.py shell或python manage.py runserver时出现错误

type Error None type object is not callable

我正在使用：

Python version 3.4.3,
Os win8,
Django version 1.11,
mysql 5.7,
MySQL Connector/Python.

错误：

Traceback (most recent call last):
  File "C:\Users\Bibek Ghimire\djcode\database\manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line 363, in execute_from_command_line
    utility.execute()
  File "C:\Python34\lib\site-packages\django\core\management\__init__.py", line 337, in execute
    django.setup()
  File "C:\Python34\lib\site-packages\django\__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Python34\lib\site-packages\django\apps\registry.py", line 108, in populate
    app_config.import_models()
  File "C:\Python34\lib\site-packages\django\apps\config.py", line 202, in import_models
    self.models_module = import_module(models_module_name)
  File "C:\Python34\lib\importlib\__init__.py", line 109, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
  File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
  File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
  File "<frozen importlib._bootstrap>", line 1129, in _exec
  File "<frozen importlib._bootstrap>", line 1471, in exec_module
  File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
  File "C:\Python34\lib\site-packages\django\contrib\auth\models.py", line 4, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "C:\Python34\lib\site-packages\django\contrib\auth\base_user.py", line 52, in <module>
    class AbstractBaseUser(models.Model):
  File "C:\Python34\lib\site-packages\django\db\models\base.py", line 124, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "C:\Python34\lib\site-packages\django\db\models\base.py", line 330, in add_to_class
    value.contribute_to_class(cls, name)
  File "C:\Python34\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:\Python34\lib\site-packages\django\db\__init__.py", line 33, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "C:\Python34\lib\site-packages\django\db\utils.py", line 212, in __getitem__
    conn = backend.DatabaseWrapper(db, alias)
  File "C:\Python34\lib\site-packages\mysql\connector\django\base.py", line 336, in __init__
    super(DatabaseWrapper, self).__init__(*args, **kwargs)
  File "C:\Python34\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

Answer 1

/ MySQL并不总是支持最新版本的Django.您的回溯看起来类似于this issue。

我建议您尝试使用recommended choice for using MySQL with Django，即mysqlclient。

Answer 2

为了与Django1.11兼容，https://github.com/multiplay/mysql-connector-python上提供了mysql连接器的补丁版本。

Answer 3

在数据库设置中替换：

'ENGINE':'mysql.connector.django',

使用：

'ENGINE':'django.db.backends.mysql'