70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
from collections.abc import Generator
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from sqlalchemy import create_engine, inspect, text
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from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
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from app.core.config import settings
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class Base(DeclarativeBase):
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pass
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def build_engine(database_url: str):
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connect_args: dict[str, object] = {}
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if database_url.startswith("sqlite"):
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connect_args["check_same_thread"] = False
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return create_engine(database_url, future=True, connect_args=connect_args)
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engine = build_engine(settings.database_url)
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SessionLocal = sessionmaker(
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bind=engine,
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autoflush=False,
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autocommit=False,
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expire_on_commit=False,
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class_=Session,
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)
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def get_db() -> Generator[Session, None, None]:
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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def init_db() -> None:
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import app.models # noqa: F401
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# Keep a lightweight runtime bootstrap for empty local databases so the app
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# can still start before Alembic is wired into every environment.
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Base.metadata.create_all(bind=engine)
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_upgrade_legacy_schema()
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def _upgrade_legacy_schema() -> None:
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inspector = inspect(engine)
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table_names = set(inspector.get_table_names())
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if "users" not in table_names:
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return
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existing_columns = {column["name"] for column in inspector.get_columns("users")}
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if "token_version" in existing_columns:
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pass
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else:
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# Keep this compatibility path narrowly scoped for older local databases
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# that predate the Alembic baseline migration.
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with engine.begin() as connection:
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connection.execute(
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text(
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"ALTER TABLE users "
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"ADD COLUMN token_version INTEGER NOT NULL DEFAULT 0"
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)
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)
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if "telegram_links" not in table_names:
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Base.metadata.tables["telegram_links"].create(bind=engine)
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