我正试图在我的mac上设置一个django-rest项目。每当我运行python manage.py makemigrations时，它都会显示：Did you install mysqlclient or MySQL-python?错误。但是，这两个都已安装。
全栈跟踪：
(VB_env) staff-207-213:VB_Backend_SCG nitishpatkar$ python manage.py makemigrations
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
utility.execute()
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/core/management/__init__.py", line 338, in execute
django.setup()
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/__init__.py", line 27, in setup
apps.populate(settings.INSTALLED_APPS)
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
app_config.import_models()
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/apps/config.py", line 202, in import_models
self.models_module = import_module(models_module_name)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/contrib/auth/models.py", line 4, in <module>
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/contrib/auth/base_user.py", line 52, in <module>
class AbstractBaseUser(models.Model):
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/db/models/base.py", line 124, in __new__
new_class.add_to_class('_meta', Options(meta, app_label))
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/db/models/base.py", line 325, in add_to_class
value.contribute_to_class(cls, name)
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/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 "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/db/__init__.py", line 33, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/db/utils.py", line 211, in __getitem__
backend = load_backend(db['ENGINE'])
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/db/utils.py", line 115, in load_backend
return import_module('%s.base' % backend_name)
File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
File "/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 30, in <module>
'Did you install mysqlclient or MySQL-python?' % e
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: dlopen(/Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/_mysql.so, 2): Symbol not found: _mysql_affected_rows
Referenced from: /Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/_mysql.so
Expected in: flat namespace
in /Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages/_mysql.so.
Did you install mysqlclient or MySQL-python?
(VB_env) staff-207-213:VB_Backend_SCG nitishpatkar$ pip install mysqlclient
Requirement already satisfied: mysqlclient in /Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages (1.3.13)
(VB_env) staff-207-213:VB_Backend_SCG nitishpatkar$ pip install mysql-python
Requirement already satisfied: mysql-python in /Users/nitishpatkar/Development/Vision Backlog rewrite/VB_env/lib/python2.7/site-packages (1.2.5)
(VB_env) staff-207-213:VB_Backend_SCG nitishpatkar$
实际问题是
Symbol not found: _mysql_affected_rows
也就是说，MySQL Python模块无法加载，因为操作系统找不到应该在操作系统的MySQL客户端库中的符号，这可能是因为它们已经过时了。
例如，这个SO问题引用了这一点：Django-MySQLdb：找不到符号：_mysql_affected_rows
如何实际解决这一问题取决于您最初安装这些库的方式(例如使用brew？(。