From 7794380c5908869bae28eed0b216aa8c1851bac2 Mon Sep 17 00:00:00 2001
From: Gagan Deep <pandafy.dev@gmail.com>
Date: Mon, 5 Feb 2024 19:10:01 +0530
Subject: [PATCH] Fixed sortable widget not working in stacked inline admin

The draggable/sortable feature were not working for elements
dynamically added using "Add another XYZ" link.
---
 example/testapp/admin.py             | 12 +++++++++++-
 example/testapp/models.py            |  5 +++++
 sortedm2m/static/sortedm2m/widget.js |  4 +++-
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/example/testapp/admin.py b/example/testapp/admin.py
index ca1cc714..2c85b22a 100644
--- a/example/testapp/admin.py
+++ b/example/testapp/admin.py
@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from example.testapp.models import Car, ParkingArea
+from example.testapp.models import Car, Garage, ParkingArea
 
 
 class ParkingAreaAdmin(admin.ModelAdmin):
@@ -15,5 +15,15 @@ class ParkingAreaAdmin(admin.ModelAdmin):
     )
 
 
+class ParkingAreaInlineAdmin(admin.StackedInline):
+    model = ParkingArea
+    extra = 0
+
+
+class GarageAdmin(admin.ModelAdmin):
+    inlines = [ParkingAreaInlineAdmin]
+
+
 admin.site.register(Car)
+admin.site.register(Garage, GarageAdmin)
 admin.site.register(ParkingArea, ParkingAreaAdmin)
diff --git a/example/testapp/models.py b/example/testapp/models.py
index bc6ce235..73e870b0 100644
--- a/example/testapp/models.py
+++ b/example/testapp/models.py
@@ -16,8 +16,13 @@ def __str__(self):
         return str(self.car) + " in " + str(self.parkingarea)  # pylint: disable=no-member
 
 
+class Garage(models.Model):
+    name = models.CharField(max_length=30)
+
+
 class ParkingArea(models.Model):
     name = models.CharField(max_length=50)
+    garage = models.ForeignKey(Garage, on_delete=models.CASCADE, null=True, blank=True, default=None)
     cars = SortedManyToManyField(Car, base_class=BaseCarThrough)
 
     def __str__(self):
diff --git a/sortedm2m/static/sortedm2m/widget.js b/sortedm2m/static/sortedm2m/widget.js
index aacbdf52..4b48dbd6 100644
--- a/sortedm2m/static/sortedm2m/widget.js
+++ b/sortedm2m/static/sortedm2m/widget.js
@@ -62,7 +62,9 @@ if (typeof jQuery === 'undefined') {
         }
 
         function iterateUl() {
-            $('.sortedm2m-items').each(function () {
+            // Add sortable only to visible .sortedm2m-items.
+            // Exclude element with class .sortedm2m since they are already initialized
+            $('.sortedm2m-items:visible:not(.sortedm2m)').each(function () {
                 var ul = $(this);
 
                 prepareUl(ul);