Artem Kashaev
42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
from collections.abc import Generator
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from time import sleep
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from sqlalchemy import MetaData, create_engine, text
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from sqlalchemy.exc import OperationalError
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from sqlalchemy.orm import Session, sessionmaker
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from app.core import settings
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engine = create_engine(
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settings.database_url,
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pool_pre_ping=True,
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connect_args={"connect_timeout": 3},
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)
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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def create_schema(metadata: MetaData, attempts: int = 30, delay_seconds: int = 2) -> None:
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last_error: OperationalError | None = None
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for attempt in range(1, attempts + 1):
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try:
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print(f"Connecting to database, attempt {attempt}/{attempts}", flush=True)
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with engine.begin() as connection:
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connection.execute(text("SELECT 1"))
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metadata.create_all(bind=connection)
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print("Database schema is ready", flush=True)
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return
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except OperationalError as exc:
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last_error = exc
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print(f"Database is not ready: {exc}", flush=True)
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sleep(delay_seconds)
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if last_error:
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raise last_error
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def get_db() -> Generator[Session]:
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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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