init

backend/app/database.py

@@ -0,0 +1,24 @@
+import logging
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.orm import DeclarativeBase
+
+from app.config import settings
+
+logger = logging.getLogger("app.database")
+
+logger.info("Initializing database engine: %s", settings.DATABASE_URL.split("@")[-1])  # log host only, not password
+
+engine = create_async_engine(settings.DATABASE_URL, echo=False)
+async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db() -> AsyncSession:
+    logger.debug("Opening database session")
+    async with async_session() as session:
+        yield session
+    logger.debug("Database session closed")