first commit

backend/app/database.py

@@ -0,0 +1,19 @@
+from collections.abc import Generator
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
+
+from .config import settings
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+engine = create_engine(settings.database_url, pool_pre_ping=True)
+SessionLocal = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False)
+
+
+def get_db() -> Generator[Session, None, None]:
+    with SessionLocal() as session:
+        yield session