fix: catch errors from mounted app

The mounted application will start a response if an exception is raised from within, and then re-raise.

If the re-raised exception is allowed to propagate, a new response will be started by the litestar handler, causing an error.

This PR catches any exception raised from within the mounted application and logs it.

src/sqladmin_litestar_plugin/__init__.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import logging
 from typing import TYPE_CHECKING, Any
 
 import sqladmin
@@ -25,6 +26,8 @@
 
 __all__ = ("SQLAdminPlugin",)
 
+logger = logging.getLogger(__name__)
+
 
 class SQLAdminPlugin(InitPluginProtocol):
     def __init__(  # noqa: PLR0913
@@ -90,8 +93,9 @@ async def wrapped_app(scope: Scope, receive: Receive, send: Send) -> None:
             app = scope["app"]
             try:
                 await self.app(scope, receive, send)  # type: ignore[arg-type]
-            finally:
-                scope["app"] = app
+            except Exception:
+                logger.exception("Error raised from SQLAdmin app")
+            scope["app"] = app
 
         app_config.route_handlers.append(wrapped_app)
         return app_config

tests/test_plugin.py

@@ -40,15 +40,16 @@ def test_views_added_to_admin_app(plugin: SQLAdminPlugin, monkeypatch: pytest.Mo
     mock.assert_called_once_with(plugin.views[0])
 
 
+@pytest.mark.parametrize("should_raise", [True, False])
 @pytest.mark.anyio()
 async def test_resets_app_in_scope(
-    plugin: SQLAdminPlugin, app: Litestar, monkeypatch: pytest.MonkeyPatch
+    *, should_raise: bool, plugin: SQLAdminPlugin, app: Litestar, monkeypatch: pytest.MonkeyPatch
 ) -> None:
-    mock = MagicMock()
+    mock = MagicMock(side_effect=RuntimeError if should_raise else None)
 
     async def fake_admin_app(scope: Scope, _: Receive, __: Send) -> None:  # noqa: RUF029
-        mock()
         scope["app"] = "admin"  # type: ignore[arg-type]
+        mock()
 
     monkeypatch.setattr(plugin, "app", fake_admin_app)
     handler = app.route_handler_method_map["/"]["asgi"].fn