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61d29fc 5ce4a10 61d29fc 5ce4a10 61d29fc | 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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | """
Database connection and session management
"""
import os
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
from sqlalchemy.pool import StaticPool
from typing import Generator
from api.models import Base
# Database URL priority:
# 1. NEON_DATABASE_URL_DEV (local development with PostgreSQL)
# 2. NEON_DATABASE_URL (production Neon PostgreSQL)
# 3. DATABASE_URL (backwards compatibility)
# 4. SQLite fallback (no setup required)
DATABASE_URL = os.getenv(
"NEON_DATABASE_URL_DEV",
os.getenv(
"NEON_DATABASE_URL",
os.getenv(
"DATABASE_URL",
"sqlite:///./data/users.db"
)
)
)
# Handle PostgreSQL URL format for SQLAlchemy 2.0+
if DATABASE_URL.startswith("postgres://"):
DATABASE_URL = DATABASE_URL.replace("postgres://", "postgresql://", 1)
# Create engine
if "sqlite" in DATABASE_URL:
# SQLite needs special handling for concurrent access
engine = create_engine(
DATABASE_URL,
connect_args={"check_same_thread": False},
poolclass=StaticPool,
)
else:
# PostgreSQL configuration
engine = create_engine(
DATABASE_URL,
pool_pre_ping=True,
pool_size=10,
max_overflow=20,
)
# Create session factory
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
def init_db():
"""Create all tables"""
Base.metadata.create_all(bind=engine)
print(f"✅ Database initialized at: {DATABASE_URL}")
def get_db() -> Generator[Session, None, None]:
"""
Database session dependency for FastAPI
Usage:
@app.get("/users")
def get_users(db: Session = Depends(get_db)):
return db.query(User).all()
"""
db = SessionLocal()
try:
yield db
finally:
db.close()
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