From c5d482d4d7cfdd94d5674d41a1c689a01a98b9c2 Mon Sep 17 00:00:00 2001
From: danamansana <danielappel@nypl.org>
Date: Fri, 13 Mar 2026 13:08:25 -0400
Subject: [PATCH] Add shelfmark sorting for callnumber searches

---
 lib/resources.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/resources.js b/lib/resources.js
index 462ae779..3c9cccf6 100644
--- a/lib/resources.js
+++ b/lib/resources.js
@@ -46,6 +46,10 @@ const SORT_FIELDS = {
     initialDirection: 'asc',
     field: 'creator_sort'
   },
+  callnumber: {
+    initialDirection: 'asc',
+    field: 'shelfMark.keywordLowercased'
+  },
   relevance: {}
 }