forked from edward/owl-map
40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
"""Database functions."""
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import flask
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import sqlalchemy
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from sqlalchemy import create_engine, func
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from sqlalchemy.engine import reflection
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from sqlalchemy.orm import scoped_session, sessionmaker
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session: sqlalchemy.orm.scoping.scoped_session = scoped_session(sessionmaker())
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def init_db(db_url: str, echo: bool = False) -> None:
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"""Initialise database."""
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session.configure(bind=get_engine(db_url, echo=echo))
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def get_engine(db_url: str, echo: bool = False) -> sqlalchemy.engine.base.Engine:
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"""Create an engine objcet."""
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return create_engine(db_url, pool_recycle=3600, echo=echo)
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def get_tables() -> list[str]:
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"""Get a list of table names."""
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tables: list[str] = reflection.Inspector.from_engine(session.bind).get_table_names()
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return tables
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def init_app(app: flask.app.Flask, echo: bool = False) -> None:
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"""Initialise database connection within flask app."""
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db_url = app.config["DB_URL"]
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session.configure(bind=get_engine(db_url, echo=echo))
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@app.teardown_appcontext
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def shutdown_session(exception: Exception | None = None) -> None:
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session.remove()
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def now_utc():
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return func.timezone("utc", func.now())
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