init

backend/app/database.py

@@ -0,0 +1,42 @@
+"""Database configuration and session management"""
+
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
+from sqlalchemy.orm import declarative_base
+from app.config import settings
+
+# Create async engine
+engine = create_async_engine(
+    settings.database_url,
+    echo=settings.debug,
+    future=True
+)
+
+# Create async session factory
+async_session_maker = async_sessionmaker(
+    engine,
+    class_=AsyncSession,
+    expire_on_commit=False
+)
+
+# Base class for models
+Base = declarative_base()
+
+
+async def get_db() -> AsyncSession:
+    """Dependency for getting database session"""
+    async with async_session_maker() as session:
+        try:
+            yield session
+            await session.commit()
+        except Exception:
+            await session.rollback()
+            raise
+        finally:
+            await session.close()
+
+
+async def init_db():
+    """Initialize database tables"""
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+