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db7c1e8 | 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 | from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
from sqlalchemy.orm import sessionmaker
from .settings import settings
import logging
logger = logging.getLogger(__name__)
try:
# Create async engine with proper configuration from settings
engine = create_async_engine(
settings.neon_db_url,
echo=settings.debug, # Set to True to log SQL queries
pool_pre_ping=True, # Verify connections before use
pool_size=20, # Connection pool size
max_overflow=30, # Additional connections beyond pool_size
pool_recycle=3600, # Recycle connections after 1 hour
pool_pre_ping_enabled=True, # Enable connection health checks
pool_pool_timeout=30, # Connection timeout
pool_reset_on_return='commit' # Reset connection on return
)
# Create async session factory
AsyncSessionLocal = sessionmaker(
engine,
class_=AsyncSession,
expire_on_commit=False
)
logger.info("Database engine created successfully")
except Exception as e:
logger.error(f"Failed to create database engine: {e}")
raise
async def get_db_session():
"""Dependency to get database session"""
async with AsyncSessionLocal() as session:
try:
yield session
except Exception as e:
logger.error(f"Database session error: {e}")
await session.rollback()
raise
finally:
await session.close()
# Initialize the database connection
async def init_db():
"""Initialize the database connection and create tables if needed"""
from ..db.base import Base
logger.info("Initializing database connection...")
try:
# Create all tables
async with engine.begin() as conn:
await conn.run_sync(Base.metadata.create_all)
logger.info("Database tables created successfully")
except Exception as e:
logger.error(f"Failed to initialize database: {e}")
raise |