File: issue_9102_workaround.py

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sqlalchemy 2.0.43%2Bds1-1
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from sqlalchemy import Column
from sqlalchemy import Integer
from sqlalchemy.orm import registry


class BackendMeta:
    __abstract__ = True
    mapped_registry: registry = registry()
    metadata = mapped_registry.metadata


reg: registry = BackendMeta.mapped_registry


@reg.mapped
class User:
    __tablename__ = "user"

    id: int = Column(Integer(), primary_key=True)