Django连接MySQL报错：OperationalError 1045 Access denied for user

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解决方法：

# 进入mysql
mysql -u root =p

# 进入项目使用的数据库
use test

# 运行
grant usage on *.* to root@localhost identified by 'password';  # password是进入MySQL设置的密码
GRANT all privileges on DBNAME.* to 'root'@'localhost' IDENTIFIED BY 'root' WITH GRANT OPTION;
FLUSH PRIVILEGES;

重新生成迁移文件： python manage.py makemigrations
应用数据库迁移： python manage.py migrate