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File size: 1,179 Bytes
4aed8ef ec3000e ecaf7ad 4aed8ef b43ff84 ec3000e b43ff84 4aed8ef ecaf7ad ec3000e 4aed8ef b43ff84 4aed8ef | 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 42 43 44 45 46 47 48 | from typing import Generator
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
from contextlib import contextmanager
from dotenv import load_dotenv
import os
load_dotenv()
_engine = None
_SessionLocal = None
def get_engine():
global _engine
if _engine is None:
# Load the database URL from environment variables
database_url = os.getenv("DATABASE_URL")
if not database_url:
raise ValueError("DATABASE_URL is not set in environment variables")
# Create the SQLAlchemy engine
_engine = create_engine(database_url, pool_pre_ping=True)
return _engine
def get_session_local() -> sessionmaker:
global _SessionLocal
if _SessionLocal is None:
# Create a new session local
_SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=get_engine())
return _SessionLocal
@contextmanager
def get_session() -> Generator[Session, None, None]:
"""
Get a connection to the Postgres database
"""
SessionLocal = get_session_local()
db = SessionLocal()
try:
yield db
finally:
db.close()
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