first commit

app/core/database.py

@@ -0,0 +1,21 @@
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+from app.config.settings import settings
+
+engine = create_async_engine(settings.database_url, echo=settings.debug)
+async_session = async_sessionmaker(engine, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db() -> AsyncSession:
+    async with async_session() as session:
+        yield session
+
+
+async def init_db():
+    import app.models  # noqa: F401 — ensure all models are registered
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)