fix(tests): fixed test runtime errors regarding database connection

7project/backend/app/services/db.py

@@ -3,11 +3,20 @@ from fastapi import Depends
 from sqlalchemy.ext.asyncio import AsyncSession
 from fastapi_users.db import SQLAlchemyUserDatabase
 
-from ..core.db import async_session_maker
+from ..core.db import async_session_maker, engine
+from ..core.base import Base
 from ..models.user import User, OAuthAccount
 
+_initialized = False
+
 
 async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
+    global _initialized
+    if not _initialized:
+        # Lazily ensure tables exist; helpful for test runs without migrations
+        async with engine.begin() as conn:
+            await conn.run_sync(Base.metadata.create_all)
+        _initialized = True
     async with async_session_maker() as session:
         yield session