new init

apps/backend/app/core/database.py

@@ -0,0 +1,32 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, declarative_base
+from contextlib import contextmanager
+
+# Datenbank-URL (später besser aus Umgebungsvariable laden)
+DATABASE_URL = "postgresql://postgres:bacchus@localhost:5432/bacchus"
+
+engine = create_engine(DATABASE_URL)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+# Dependency für FastAPI-Routen
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+# Optional: Kontextmanager für Skripte außerhalb von FastAPI
+@contextmanager
+def db_session():
+    db = SessionLocal()
+    try:
+        yield db
+        db.commit()
+    except:
+        db.rollback()
+        raise
+    finally:
+        db.close()