From 500010180313bd086dcc06ddc9eb908af6d2990a Mon Sep 17 00:00:00 2001
From: Anastasia Beglova <abeglova@mit.edu>
Date: Wed, 11 Sep 2024 16:09:38 -0400
Subject: [PATCH] Fix refreshes and deterministic sort order

---
 .../mit-learn/src/services/react-query/react-query.ts  |  3 ++-
 learning_resources_search/api.py                       |  2 +-
 learning_resources_search/api_test.py                  | 10 +++++++++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/frontends/mit-learn/src/services/react-query/react-query.ts b/frontends/mit-learn/src/services/react-query/react-query.ts
index 2f9f0e1e22..817b4a1cc2 100644
--- a/frontends/mit-learn/src/services/react-query/react-query.ts
+++ b/frontends/mit-learn/src/services/react-query/react-query.ts
@@ -16,7 +16,8 @@ const createQueryClient = (): QueryClient => {
   return new QueryClient({
     defaultOptions: {
       queries: {
-        staleTime: 30 * 1000,
+        refetchOnWindowFocus: false,
+        staleTime: Infinity,
         queryFn: async ({ queryKey }) => {
           const url = queryKey[0]
           if (typeof url !== "string" || queryKey.length !== 1) {
diff --git a/learning_resources_search/api.py b/learning_resources_search/api.py
index 8826a6c3dd..eb4582a581 100644
--- a/learning_resources_search/api.py
+++ b/learning_resources_search/api.py
@@ -39,7 +39,7 @@
 
 LEARN_SUGGEST_FIELDS = ["title.trigram", "description.trigram"]
 COURSENUM_SORT_FIELD = "course.course_numbers.sort_coursenum"
-DEFAULT_SORT = ["featured_rank", "is_learning_material"]
+DEFAULT_SORT = ["featured_rank", "is_learning_material", "-created_on"]
 
 
 def gen_content_file_id(content_file_id):
diff --git a/learning_resources_search/api_test.py b/learning_resources_search/api_test.py
index 9450f73105..71282429f5 100644
--- a/learning_resources_search/api_test.py
+++ b/learning_resources_search/api_test.py
@@ -2636,7 +2636,15 @@ def test_document_percolation(opensearch, mocker):
     [
         ("-views", None, [{"views": {"order": "desc"}}]),
         ("-views", "text", [{"views": {"order": "desc"}}]),
-        (None, None, ["featured_rank", "is_learning_material"]),
+        (
+            None,
+            None,
+            [
+                "featured_rank",
+                "is_learning_material",
+                {"created_on": {"order": "desc"}},
+            ],
+        ),
         (None, "text", None),
     ],
 )