我在 SqlAlchemy 中有两个表
class T1(Record, SqlBase):
__tablename__ = 'table1'
__table_args__ = (PrimaryKeyConstraint('column'), {'autoload': True},)
class T2(Record, SqlBase):
__tablename__ = 'table2'
__table_args__ = (PrimaryKeyConstraint('column'), {'autoload': True},)
我想在一些公共(public)列上连接两个表
session.query(T1).join(session.query(T2), T1.column == T2.column)
但是我遇到了一个错误
InvalidRequestError: Could not find a FROM clause to join from. Tried joining to
... but got: Can't find any foreign key relationships
between 'T1' and 'FromGrouping object'. Perhaps you
meant to convert the right side to a subquery using alias()?
如何解决这个问题?两张表都没有外键
最佳答案
关于python - SqlAlchemy 加入没有外键的表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27908387/