Class CommonMixin

test/orm/declarative/test_mixin.py:1262–1269

    def test_joined_table_propagation(self):
        class CommonMixin:
            @declared_attr
            def __tablename__(cls):
                return cls.__name__.lower()

            __table_args__ = {"mysql_engine": "InnoDB"}
            timestamp = mapped_column(Integer)
            id = Column(Integer, primary_key=True)

        class Generic(Base, CommonMixin):
            discriminator = Column("python_type", String(50))