fix signal resolver issue

Author: amirreza8002

django_valkey/async_cache/cache.py

@@ -8,3 +8,4 @@ class AsyncValkeyCache(
     BaseValkeyCache[AsyncDefaultClient, AValkey], AsyncBackendCommands
 ):
     DEFAULT_CLIENT_CLASS = "django_valkey.async_cache.client.default.AsyncDefaultClient"
+    is_async = True

django_valkey/base.py

@@ -558,3 +558,21 @@ async def hkeys(self, *args, **kwargs) -> list[Any]:
 
     async def hexists(self, *args, **kwargs) -> bool:
         return await self.client.hexists(*args, **kwargs)
+
+
+# temp fix for django's #36047
+# TODO: remove this when it's fixed in django
+from django.core import signals  # noqa: E402
+from django.core.cache import caches, close_caches  # noqa: E402
+
+
+async def close_async_caches(**kwargs):
+    for conn in caches.all(initialized_only=True):
+        if getattr(conn, "is_async", False):
+            await conn.aclose()
+        else:
+            conn.close()
+
+
+signals.request_finished.connect(close_async_caches)
+signals.request_finished.disconnect(close_caches)