Django链接mysql数据库报错1064

D:\PycharmProjects\autotest>python manage.py makemigrations

django.db.utils.ProgrammingError: (1064, "You have an error in your SQL syntax;
check the manual that corresponds to your MySQL server version for the right syn
tax to use near 'SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED' at line
1")

在autotest目录的__init__.py 已经添加以下两行：

import pymysql

pymysql.install_as_MySQLdb()

settings.py中修改为如下内容:

DATABASES = {
    'default':
        {
            'ENGINE': 'django.db.backends.mysql',
            'NAME': 'autotest',
            'USER': 'root',
            'PASSWORD': '123456',
            'HOST': '127.0.0.1',
            'PORT': '3306',
            'OPTIONS': {'isolation_level': None}
        }
}

--------------------------------------------------

DATABASES = {
    'default':
        {
            'ENGINE': 'django.db.backends.mysql',
            'NAME': 'autotest',
            'USER': 'root',
            'PASSWORD': '123456',
            'HOST': '127.0.0.1',
            'PORT': '3306',
            'OPTIONS': {'isolation_level': None} #加了这一句就好了
        }
}