File size: 924 Bytes
63d3857 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from backend.config import DB_URL
engine = create_engine(DB_URL, connect_args={"check_same_thread": False})
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
def get_db():
"""
Dependency for FastAPI routes: yields a SQLAlchemy session.
Usage: add as a dependency in route functions.
"""
db = SessionLocal()
try:
yield db
finally:
db.close()
from contextlib import contextmanager
@contextmanager
def session_scope():
"""
Context manager for non-FastAPI scripts:
with session_scope() as db:
...
Commits on success, rolls back on exception.
"""
db = SessionLocal()
try:
yield db
db.commit()
except Exception:
db.rollback()
raise
finally:
db.close()
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