From 705b0c69e8b67e6d562acad68e0636731dc922f3 Mon Sep 17 00:00:00 2001
From: liyuchun <liyuchun@easycorp.ltd>
Date: Tue, 31 Aug 2021 16:26:03 +0800
Subject: [PATCH]  * Fix bug #14439.

---
 module/doc/model.php                   | 2 +-
 module/doc/view/tablecontents.html.php | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/module/doc/model.php b/module/doc/model.php
index dc7f054707..34b2071b52 100644
--- a/module/doc/model.php
+++ b/module/doc/model.php
@@ -2310,7 +2310,7 @@ EOT;
         {
             $libs = $this->getLibsByObject('book', 0, '', $appendLib);
             $this->app->rawMethod = 'book';
-            if($libID == 0 and !empty($libs)) $libID = reset($libs)->id;
+            if(!empty($libs) and ($libID == 0 or !isset($libs[$libID]))) $libID = reset($libs)->id;
             $this->lang->modulePageNav = $this->select($type, $objects, $objectID, $libs, $libID);
 
             $object = new stdclass();
diff --git a/module/doc/view/tablecontents.html.php b/module/doc/view/tablecontents.html.php
index e54b1de5a8..fa0adfb0db 100644
--- a/module/doc/view/tablecontents.html.php
+++ b/module/doc/view/tablecontents.html.php
@@ -52,7 +52,7 @@ if(empty($type)) $type = 'product';
           echo '</ul></div>';
       }
 
-      if($type == 'book' and ($canEditLib or $canManageBook))
+      if($type == 'book' and ($canEditLib or $canManageBook) and !empty($libs))
       {
           echo "<div class='menu-actions'>";
           echo html::a('javascript:;', "<i class='icon icon-ellipsis-v'></i>", '', "data-toggle='dropdown' class='btn btn-link'");