'NoneType' object has no attribute 'foreign_key_ddl'

  File "./watermark/models.py", line 103, in <module>
    class WaterMark(db.Model):
  File "./watermark/models.py", line 107, in WaterMark
    INTEGER(unsigned=True),
  File "/usr/local/lib/python3.7/site-packages/sqlalchemy/testing/schema.py", line 76, in Column
    if not config.requirements.foreign_key_ddl.enabled_for_config(config):
AttributeError: 'NoneType' object has no attribute 'foreign_key_ddl'

#  原始代码
from sqlalchemy.testing.schema import Column

    id = Column(
        INTEGER(unsigned=True),
        primary_key=True
    )

solve

from sqlalchemy import  Column
    id = Column(
        INTEGER(unsigned=True),
        primary_key=True
    )

• 使用编辑器自动导包需要注意不要导错了

来源：CSDN

作者：vivian_wanjin

链接：https://blog.csdn.net/vivian_wanjin/article/details/103462007