Flask回滾時出現AttributeError: 'NoneType' object has no attribute 'lower'
在做flask項目中的版本回退,時,出現了AttributeError: ‘NoneType’ object has no attribute ‘lower’ 執行python 文件名.py db downgrade 版本號，後報錯了,主要的報錯內容如下: INFO [alembic.runtime.migration] Context impl MySQLImpl. INFO [alembic.
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- 1. AttributeError: 'NoneType' object has no attribute 'recovery'
- 2. AttributeError: 'NoneType' object has no attribute 'GetLayer'
- 3. AttributeError: 'NoneType' object has no attribute 'split'
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