# database.py
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

SQLALCHEMY_DATABASE_URL = "postgresql://user:password@localhost/dbname"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL,
    pool_size=5,
    pool_pre_ping=True,
    pool_recycle=300,
    max_overflow=0
                       
                       )
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()