Hello,
I have the following code, which sets UniqueConstraint using fields ("foo",
"bar") from inherit class.
from sqlalchemy.ext.declarative import declarative_base, declared_attr
from sqlalchemy import Column, Integer, Unicode, UniqueConstraint
Base = declarative_base()
class Foo(object):
foo = Column(Unicode(64), nullable=False)
@declared_attr
def bar(cls):
return Column("bar", Integer)
class ItemCategory(Base, Foo):
__tablename__ = 'item_category'
id = Column(Integer, primary_key=True)
name = Column(Unicode(64), nullable=False)
__table_args__ = (
UniqueConstraint(name, "foo", "bar",
name='unique_category_and_parent'),)Введите код...
It's work ok with sqlalchemy==0.9.9, but sqlalchemy>=1.0 raises an
exception.
"foo" field work ok, "bar" defined with declared_attr raises KeyError.
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