From d3a4d476eb61295b09443d6fdbba49750a674b23 Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Fri, 14 Aug 2026 13:58:07 +0000
Subject: [PATCH] fix(stock): honour pick serial / batch based on in the batch
 selector (backport #58176) (#58182)

Co-authored-by: Sudharsanan Ashok <135326972+Sudharsanan11@users.noreply.github.com>
---
 .../public/js/utils/serial_no_batch_selector.js    | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/erpnext/public/js/utils/serial_no_batch_selector.js b/erpnext/public/js/utils/serial_no_batch_selector.js
index 0f84a84e300..1b93c9b46c9 100644
--- a/erpnext/public/js/utils/serial_no_batch_selector.js
+++ b/erpnext/public/js/utils/serial_no_batch_selector.js
@@ -8,6 +8,16 @@ erpnext.SerialBatchPackageSelector = class SerialNoBatchBundleUpdate {
 			? this.item.rejected_serial_and_batch_bundle
 			: this.item.serial_and_batch_bundle;
 
+		this.init();
+	}
+
+	async init() {
+		try {
+			this.based_on = await erpnext.stock.get_pick_serial_batch_based_on();
+		} catch (e) {
+			this.based_on = "FIFO";
+		}
+
 		this.make();
 		this.render_data();
 	}
@@ -390,7 +400,7 @@ erpnext.SerialBatchPackageSelector = class SerialNoBatchBundleUpdate {
 			{
 				fieldtype: "Select",
 				options: ["FIFO", "LIFO", "Expiry"],
-				default: "FIFO",
+				default: this.based_on,
 				fieldname: "based_on",
 				label: __("Fetch Based On"),
 				onchange: () => this.get_auto_data(),
@@ -536,7 +546,7 @@ erpnext.SerialBatchPackageSelector = class SerialNoBatchBundleUpdate {
 		}
 
 		if (!based_on) {
-			based_on = "FIFO";
+			based_on = this.based_on;
 		}
 
 		let warehouse = this.item.warehouse || this.item.s_warehouse;