Initial FastAPI + SQLite + Alembic

fastapi_demo/app/db/session.py

@@ -0,0 +1,24 @@
+from __future__ import annotations
+
+from pathlib import Path
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, declarative_base
+
+from fastapi_demo.app.core.config import settings
+
+# sorgt dafür, dass ./data existiert (für sqlite datei)
+Path("data").mkdir(exist_ok=True)
+
+engine = create_engine(
+    settings.DATABASE_URL,
+    connect_args={"check_same_thread": False}
+    if settings.DATABASE_URL.startswith("sqlite")
+    else {},
+)
+
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+def dispose_engine() -> None:
+    engine.dispose()