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【DM版本】:达梦v8
【操作系统】：ubuntu
【CPU】: Linux 4.19.90-52.44.v2207.ky10.x86_64 #3 SMP Sat Feb 8 14:30:49 CST 2025 x86_64 GNU/Linux
【问题描述】*：运行报错
【python版本】3.11.12

# pip freeze
dmPython==2.5.11
greenlet==3.2.3
SQLAlchemy==1.4.6
sqlalchemy-dm==1.4.39

验证脚本

from urllib.parse import quote
import sqlalchemy as sa
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.orm import declarative_base


Base = declarative_base()


class TestTable(Base):
    __tablename__ = 'test_table'

    uid = sa.Column(sa.BigInteger, primary_key=True, autoincrement=True)
    username = sa.Column(sa.String(200), nullable=False)
    nickname = sa.Column(sa.String(200), nullable=True)


def main():
    host = '127.0.0.1'
    port = 5328
    user = 'dm_user'
    password = quote('dm_password')

    url = f'dm+dmPython://{user}:{password}@{host}:{port}/?schema=demo_db'
    print(f'{url = !r}')

    engine = create_engine(
        url=url,
        echo=True,
    )

    Session = sessionmaker(bind=engine)

    with Session() as session:
        po = TestTable(username='hello')
        session.add(po)
        session.commit()


main()

运行报错

# python ./test.py
2025-06-26 15:16:11,703 INFO sqlalchemy.engine.Engine SELECT USER FROM DUAL
2025-06-26 15:16:11,703 INFO sqlalchemy.engine.Engine [raw sql] []
2025-06-26 15:16:11,704 INFO sqlalchemy.engine.Engine SELECT USER FROM DUAL
2025-06-26 15:16:11,704 INFO sqlalchemy.engine.Engine [raw sql] []
2025-06-26 15:16:11,705 INFO sqlalchemy.engine.Engine BEGIN (implicit)
2025-06-26 15:16:11,707 INFO sqlalchemy.engine.Engine INSERT INTO test_table (username, nickname) VALUES (?, ?)
2025-06-26 15:16:11,707 INFO sqlalchemy.engine.Engine [generated in 0.00038s] ['hello', None]
2025-06-26 15:16:11,708 INFO sqlalchemy.engine.Engine ROLLBACK
Traceback (most recent call last):
  File "/root/./test.py", line 43, in <module>
    main()
  File "/root/./test.py", line 40, in main
    session.commit()
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 1415, in commit
    self._transaction.commit(_to_root=self.future)
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 829, in commit
    self._prepare_impl()
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 808, in _prepare_impl
    self.session.flush()
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 3233, in flush
    self._flush(objects)
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 3372, in _flush
    with util.safe_reraise():
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/util/langhelpers.py", line 70, in __exit__
    compat.raise_(
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/util/compat.py", line 211, in raise_
    raise exception
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/session.py", line 3333, in _flush
    flush_context.execute()
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/unitofwork.py", line 453, in execute
    rec.execute(self)
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/unitofwork.py", line 627, in execute
    util.preloaded.orm_persistence.save_obj(
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/persistence.py", line 242, in save_obj
    _emit_insert_statements(
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/orm/persistence.py", line 1219, in _emit_insert_statements
    result = connection._execute_20(
             ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1520, in _execute_20
    return meth(self, args_10style, kwargs_10style, execution_options)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/sql/elements.py", line 313, in _execute_on_connection
    return connection._execute_clauseelement(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1389, in _execute_clauseelement
    ret = self._execute_context(
          ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1748, in _execute_context
    self._handle_dbapi_exception(
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1933, in _handle_dbapi_exception
    util.raise_(exc_info[1], with_traceback=exc_info[2])
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/util/compat.py", line 211, in raise_
    raise exception
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 1721, in _execute_context
    result = context._setup_result_proxy()
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/default.py", line 1377, in _setup_result_proxy
    result = self._setup_dml_or_text_result()
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy/engine/default.py", line 1443, in _setup_dml_or_text_result
    self._setup_ins_pk_from_lastrowid()
  File "/usr/local/lib/python3.11/site-packages/sqlalchemy_dm-1.4.39-py3.11.egg/sqlalchemy_dm/base.py", line 1674, in _setup_ins_pk_from_lastrowid
AttributeError: 'PrimaryKeyConstraint' object has no attribute 'c'