Django連接mysql常見錯誤

• 1045, “Access denied for user 'root'@'localhost' (using password: YES)”
  數據庫的密碼或用戶名不對，查看settings.py
  
  

• 1049, "Unknown database 'nav_db'"
  數據庫不存在，查看settings.py或在mysql中新建數據庫
  
  

• RuntimeError: Model class django_openid_auth.models.Nonce doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.
  在INSTALLED_APPS中卸掉一個模塊后，urls.py的urlpatterns也要卸掉對應的路由
  
  

• 1146, "Table 'nav_db.django_session' doesn't exist"
  需要先初始化django的數據表

python manage.py makemigrations
python manage.py migrate

• 1251, 'Client does not support authentication protocol requested by server; consider upgrading MySQL client'
  需要在mysql客戶端重置密碼

>>USE mysql; 
>>ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '831015';
>>FLUSH PRIVILEGES;

• python2.7無法安裝MySQLDB或者mysqlclient
  下載一個mysqlclient-1.4.2-cp27-cp27m-win_amd64.whl，pip install