From 4152fda2a2788d53acb277e92c3be4f4b3141f06 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 20 Aug 2025 19:19:04 +0530
Subject: [PATCH] Content server: Fix an error when editing a book's metadata
 to change both the cover and another field. Fixes #2117412 [Error when
 editing Cover and adding book info on web interface tool in safari and
 chrome](https://bugs.launchpad.net/calibre/+bug/2117412)

---
 src/pyj/book_list/edit_metadata.pyj | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pyj/book_list/edit_metadata.pyj b/src/pyj/book_list/edit_metadata.pyj
index f18227bb60..b95e7bae65 100644
--- a/src/pyj/book_list/edit_metadata.pyj
+++ b/src/pyj/book_list/edit_metadata.pyj
@@ -969,7 +969,7 @@ def render_metadata(mi, table, container_id, book_id):  # {{{
         if changes.cover is '--remove--':
             img.removeAttribute('src')
             changes.cover = None
-        else:
+        elif jstype(changes.cover) is not 'string':
             r = FileReader()
             r.onload = def(evt):
                 img.src = evt.target.result