From f23463f8d60765f82ccd1a027bb89c2426869147 Mon Sep 17 00:00:00 2001
From: Anastasios Bithas <anastasiostam@gmail.com>
Date: Sat, 4 Feb 2023 18:36:19 +0200
Subject: [PATCH] MDL-73642 mod_assign: Disable draft option if submission
 already made

---
 mod/assign/mod_form.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mod/assign/mod_form.php b/mod/assign/mod_form.php
index 64fdde4b2fd..1ec86488d28 100644
--- a/mod/assign/mod_form.php
+++ b/mod/assign/mod_form.php
@@ -127,6 +127,9 @@ class mod_assign_mod_form extends moodleform_mod {
         $name = get_string('submissiondrafts', 'assign');
         $mform->addElement('selectyesno', 'submissiondrafts', $name);
         $mform->addHelpButton('submissiondrafts', 'submissiondrafts', 'assign');
+        if ($assignment->has_submissions_or_grades()) {
+            $mform->freeze('submissiondrafts');
+        }
 
         $name = get_string('requiresubmissionstatement', 'assign');
         $mform->addElement('selectyesno', 'requiresubmissionstatement', $name);