first commit

backend/app/core/db.py

@@ -0,0 +1,24 @@
+from typing import AsyncGenerator
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import DeclarativeBase
+
+from app.core.config import settings
+
+class Base(DeclarativeBase):
+    pass
+
+def _db_url() -> str:
+    # w dockerze zwykle ustawiamy DATABASE_URL przez env, więc preferujemy settings.DATABASE_URL
+    return settings.DATABASE_URL
+
+engine = create_async_engine(_db_url(), future=True, echo=False)
+SessionLocal = async_sessionmaker(engine, expire_on_commit=False, class_=AsyncSession)
+
+async def init_db() -> None:
+    from app.models import user, router, dashboard  # noqa
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+async def get_session() -> AsyncGenerator[AsyncSession, None]:
+    async with SessionLocal() as session:
+        yield session