sqlalchemy：Alembic批量插入失败：'str'对象没有属性'_autoincrement_column'

我要做的就是创建一个

table

models.py

import sqlalchemy as safrom sqlalchemy.sql import tablefrom alembic import opdef upgrade():     categories = table('categories', sa.Column('uuid', UUID(),        primary_key=True,        unique=True, autoincrement=False), sa.Column('name', String), sa.Column('parent', String), sa.Column('created_on', sa.types.DateTime(timezone=True),        default=datetime.utcnow())    )    op.bulk_insert(categories,        [ {'name': 'first', 'parent': 'first_parent'}, {'name': 'second', 'parent': 'second_parent'}        ]    )

然后我就可以

alembic upgrade head