From 7c4793c9b6cf25eb4f0ad2ea56ceea94143eba25 Mon Sep 17 00:00:00 2001
From: Fabio Caccamo <fabio.caccamo@gmail.com>
Date: Mon, 29 May 2023 13:13:28 +0200
Subject: [PATCH] Prevent multiple `.collapse-toggle` button.

---
 .../collapsible-inlines/collapsible-inlines.js               | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/admin_interface/static/admin_interface/collapsible-inlines/collapsible-inlines.js b/admin_interface/static/admin_interface/collapsible-inlines/collapsible-inlines.js
index 1f560f4..60c4d48 100644
--- a/admin_interface/static/admin_interface/collapsible-inlines/collapsible-inlines.js
+++ b/admin_interface/static/admin_interface/collapsible-inlines/collapsible-inlines.js
@@ -20,7 +20,10 @@ if (typeof(django) !== 'undefined' && typeof(django.jQuery) !== 'undefined')
                 var collapseToggleText = (fieldsetCollapsed ? gettext('Show') : gettext('Hide'));
                 var collapseToggleHTML = ' (<a class="collapse-toggle" href="#">' + collapseToggleText + '</a>)';
                 var headerEl = fieldsetEl.find('> h2,> h3');
-                headerEl.append(collapseToggleHTML);
+                if (headerEl.find(".collapse-toggle").length === 0) {
+                    // don't add collapse toggle button if already present
+                    headerEl.append(collapseToggleHTML);
+                }
             }
 
             var stackedInlinesOptionSel = '.admin-interface.collapsible-stacked-inlines';