AttributeError: 'NoneType' object has no attribute 'lower'Flask 历史回退异常
当在做flask的历史回退时出现异常不能回退的一个bug 我在开发过程中当创建完模型后执行了一次迁移和upgrade后(记做version1吧)更改了一个模板的字段也执行了migrate和upgrade(记做version2),但是最后发现想回退到version1即执行python 文件名.py db downgrade 版本号，后报错了错误如下(由于有太多的无用错误中间的删除了)： INFO [
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相关文章
- 1. AttributeError: 'NoneType' object has no attribute 'lower'Flask 历史回退异常
- 2. AttributeError: 'NoneType' object has no attribute 'split'
- 3. AttributeError: ‘NoneType’ object has no attribute ‘data’
- 4. AttributeError: 'NoneType' object has no attribute 'astyp
- 5. AttributeError: 'NoneType' object has no attribute 'recovery'
- 6. AttributeError: 'NoneType' object has no attribute 'GetLayer'
- 7. AttributeError: 'NoneType' object has no attribute 'is_relation'
- 8. AttributeError: ‘NoneType‘ object has no attribute ‘get_text‘
- 9. AttributeError: 'NoneType' object has no attribute 'get_text'
- 10. AttributeError: 'NoneType' object has no attribute 'name'