From c412d7886c3f5b886edfab5010bbff5ddf5fd14c Mon Sep 17 00:00:00 2001
From: Syxton <davidso1@rose-hulman.edu>
Date: Fri, 11 Sep 2015 09:24:35 -0400
Subject: [PATCH] Returns all users and their lowest status in a course.

This will fix 2 issues.  The first, if a user has a suspended enrollment
in child course A, the active enrollment in child course B will be
honored over the suspended enrollment.  Also in this scenerio, the user
with multiple enrollments was causing a duplicate userid error to be
generated.
---
 locallib.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/locallib.php b/locallib.php
index 0f542e5..c89b978 100644
--- a/locallib.php
+++ b/locallib.php
@@ -977,7 +977,7 @@ class attendance {
             $maxtime = 'CASE WHEN MIN(ue.timeend) = 0 THEN 0 ELSE MAX(ue.timeend) END';
 
             // CONTRIB-3549
-            $sql = "SELECT ue.userid, ue.status,
+            $sql = "SELECT ue.userid, MIN(ue.status) as status,
                            $mintime AS mintime,
                            $maxtime AS maxtime
                       FROM {user_enrolments} ue
@@ -985,7 +985,7 @@ class attendance {
                      WHERE ue.userid $sql
                            AND e.status = :estatus
                            AND e.courseid = :courseid
-                  GROUP BY ue.userid, ue.status";
+                  GROUP BY ue.userid";
             $params += array('zerotime'=>0, 'estatus'=>ENROL_INSTANCE_ENABLED, 'courseid'=>$this->course->id);
             $enrolments = $DB->get_records_sql($sql, $params);