django mysql\base.py 报错 KeyError: <class 'bytes'>`

 

追踪源码：

问题文件：Python36\lib\site-packages\django\db\backends\mysql\base.py

    def get_new_connection(self, conn_params):
        conn = Database.connect(**conn_params)
        conn.encoders[SafeText] = conn.encoders[six.text_type]
        conn.encoders[SafeBytes] = conn.encoders[bytes]
        return conn

 

解决方案

1. 给MySQLclient降级。先卸载，再安装指定版本。pip3 uninstall mysqlclient，pip3 install mysqlclient==1.3。
2. 我最开始的解决方案，改django的代码(Python36\lib\site-packages\django \db\backends\mysql\base.py)，加一个if：

    def get_new_connection(self, conn_params):
        conn = Database.connect(**conn_params)
        conn.encoders[SafeText] = conn.encoders[six.text_type]
        # 先判断bytes是否存在于编码器中，如果在才执行操作
        if bytes in conn.encoders:
            conn.encoders[SafeBytes] = conn.encoders[bytes]
        return conn