我定义了这个类:
class Trade(Base):
__tablename__ = 'TRADE'
__table_args__ = {'quote':False}
id = Column(Integer, name='id_trade', primary_key=True)
idImnt = Column(Integer, ForeignKey('INSTRUMENT.id_imnt'), name='id_imnt')
...
当我尝试将新的Trade实例提交回数据库时,我收到了这个错误:
Instance <Trade at 0x954fd90> has a NULL identity key. If this is
an auto-generated value, check that the database table allows generation of
new primary key values, and that the mapped Column object is configured to
expect these generated values. Ensure also that this flush() is not
occurring at an inappropriate time, such as within a load() event.
我想我错过了id列定义中的一些内容。解决方案是什么?
编辑:
台式电脑:WinXP
Sybase服务器:15.5
答案 0 :(得分:0)
原来是一个司机问题。
Sybase ODBC驱动程序12.5适用于简单的选择和更新,但在将数据插入带有标识列的表时会失败。
切换到15.5驱动程序解决了这个问题。