python - Django 错误 : No module named _mysql

Question

我正在将我的应用程序从默认的 django 的 sqlitedb 迁移到 prod mariadb 数据库。有python3.3 + centos 7 + django 1.8 + apache环境。在 sqlite 上一切正常，但是在迁移之后我在 apache 重新启动后出现这样的错误:

Traceback (most recent call last):
  File "/usr/local/mainproject/mysite/mysite/wsgi.py", line 23, in <module>
  application = get_wsgi_application()
  File "/usr/local/lib/python3.3/site-packages/django/core/wsgi.py", line 14, in get_wsgi_application
django.setup()
  File "/usr/local/lib/python3.3/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/local/lib/python3.3/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models(all_models)
  File "/usr/local/lib/python3.3/site-packages/django/apps/config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
  File "/usr/local/lib/python3.3/site-packages/django/contrib/auth/models.py", line 41, in <module>
class Permission(models.Model):
  File "/usr/local/lib/python3.3/site-packages/django/db/models/base.py", line 139, in __new__
new_class.add_to_class('_meta', Options(meta, **kwargs))
  File "/usr/local/lib/python3.3/site-packages/django/db/models/base.py", line 324, in add_to_class
value.contribute_to_class(cls, name)
  File "/usr/local/lib/python3.3/site-packages/django/db/models/options.py", line 250, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/usr/local/lib/python3.3/site-packages/django/db/__init__.py", line 36, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/usr/local/lib/python3.3/site-packages/django/db/utils.py", line 240, in __getitem__
backend = load_backend(db['ENGINE'])
  File "/usr/local/lib/python3.3/site-packages/django/db/utils.py", line 111, in load_backend
return import_module('%s.base' % backend_name)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
  File "/usr/local/lib/python3.3/site-packages/django/db/backends/mysql/base.py", line 27, in <module>
raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
ImproperlyConfigured: Error loading MySQLdb module: No module named _mysql

我已经按照这里所说的那样安装了 mysqlclient https://docs.djangoproject.com/en/1.8/ref/databases/#mysql-db-api-drivers .比起我所做的 manage.py syncdb，它已经成功完成。我检查了数据库结构，没问题 - 所有数据都已迁移。但是我的应用程序启动时仍然有这样的错误。

解决方案是:使用非官方库 https://github.com/nakagami/django-cymysql/使用 django 很容易安装和配置:

$ pip install cymysql
$ pip install django-cymysql

不仅仅是将这个引擎添加到 django 的 settings.py 中:

DATABASES = {
'default': {
    'ENGINE': 'mysql_cymysql',
    'NAME': 'some_what_database',
    'HOST': ...,
    'USER': ...,
    'PASSWORD': ...,
   }
}

Answer 1

试试这个；这解决了我的问题

pip install MySQL-python