fix last_viewed serializability

Author: MichaelSun48

src/sentry/issues/endpoints/organization_group_search_views.py

@@ -176,7 +176,7 @@ def put(self, request: Request, organization: Organization) -> Response:
             user_id=request.user.id,
             group_search_view_id__in=[view.id for view in new_view_state],
         )
-        last_visited_map = {lv.group_search_view_id: lv for lv in last_visited_views}
+        last_visited_map = {lv.group_search_view_id: lv.last_visited for lv in last_visited_views}
 
         return self.paginate(
             request=request,

tests/sentry/issues/endpoints/test_organization_group_search_views.py

@@ -285,6 +285,23 @@ def test_adds_view_with_no_id(self) -> None:
             assert starred_views[idx].position == view["position"]
             assert str(starred_views[idx].group_search_view.id) == view["id"]
 
+    @with_feature({"organizations:issue-stream-custom-views": True})
+    @with_feature({"organizations:global-views": True})
+    @freeze_time("2025-03-07T00:00:00Z")
+    def test_response_with_last_visited(self) -> None:
+        GroupSearchViewLastVisited.objects.create(
+            user_id=self.user.id,
+            organization=self.organization,
+            group_search_view=self.base_data["user_one_views"][0],
+            last_visited=timezone.now(),
+        )
+
+        views = self.client.get(self.url).data
+        response = self.get_success_response(self.organization.slug, views=views)
+
+        assert response.data[0]["lastVisited"] == timezone.now()
+        assert response.data[1]["lastVisited"] is None
+
     @with_feature({"organizations:issue-stream-custom-views": True})
     @with_feature({"organizations:global-views": True})
     def test_reorder_views(self) -> None: