From 6d92f44c4b4c36fa5ab46222261e1e5ec6a28c4f Mon Sep 17 00:00:00 2001
From: qiyu-xie <qiyu_xie@163.com>
Date: Thu, 15 Apr 2021 09:43:23 +0800
Subject: [PATCH] * Fix an error.

---
 module/doc/control.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/module/doc/control.php b/module/doc/control.php
index 243d21367b..939107f84b 100644
--- a/module/doc/control.php
+++ b/module/doc/control.php
@@ -797,7 +797,7 @@ class doc extends control
         {
             $doclib   = $this->doc->getLibById($libID);
             $type     = $doclib->type == 'execution' ? 'project' : $doclib->type;
-            $objectID = $type == 'custom' ? 0 : $doclib->$type;
+            $objectID = $type == 'custom' or $type == 'book' ? 0 : $doclib->$type;
         }
 
         $this->session->set('docList', $this->app->getURI(true), $this->app->openApp);