Hi,
What is the recommended method of specifying constraints on columns
added by a subclass using single-table inheritance? This does not work,
I get a KeyError for "col_a":
class BaseClass(Base)
__table__ = "base"
__table_args__ = (Index("base_col"),
UniqueConstraint("col_a", "col_b"))
base_col = Column(Integer)
class SubClass(BaseClass):
col_a = Column(Integer)
col_b = Column(Integer)
SQLA does not allow __table_args__ placed on SubClass. I can do a
workaround by using BaseClass.__table__.append_constraint() after
defining SubClass, but mixing different ways of defining constraints
does not look nice.
Gabor
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