From a910f710fcff8c8e28c8eb6c69a76d97ca55e231 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Mudr=C3=A1k?= <david@moodle.com>
Date: Wed, 4 Jan 2017 10:58:44 +0100
Subject: [PATCH] MDL-56225 mod_forum: Fix inability to edit attachments

The 'attachments' is not a real DB field here. It comes from the form's
filepicker and holds the id of the attachments filearea. The function
forum_add_attachment() expects it as a property of the first argument.

There were two possible approaches here. Either to pass the raw $newpost
to forum_add_attachment(), or add the attachments into the list
modifiable fields. The second approach is safer.
---
 mod/forum/lib.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mod/forum/lib.php b/mod/forum/lib.php
index f368382374f..2cf35dd3244 100644
--- a/mod/forum/lib.php
+++ b/mod/forum/lib.php
@@ -4401,6 +4401,7 @@ function forum_update_post($newpost, $mform, $unused = null) {
         'timestart',
         'timeend',
         'pinned',
+        'attachments',
     ];
     foreach ($modifiablefields as $field) {
         if (isset($newpost->{$field})) {