database.py

"""
Database configuration and session management
"""
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
import os
from dotenv import load_dotenv

load_dotenv()

# Database configuration - easily switchable to PostgreSQL
SQLALCHEMY_DATABASE_URL = os.getenv(
    "DATABASE_URL", 
    "sqlite:///./ai_video_tasks.db"
)

# For SQLite, we need to enable foreign key constraints
connect_args = {}
if SQLALCHEMY_DATABASE_URL.startswith("sqlite"):
    connect_args = {"check_same_thread": False}

engine = create_engine(
    SQLALCHEMY_DATABASE_URL, 
    connect_args=connect_args
)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

def get_db():
    """
    Dependency to get database session
    """
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()