From 69b68ad6912f09787bd4ce12e03f4bcb4f6f2e75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Monlla=C3=B3?= <davidm@moodle.com>
Date: Thu, 11 Apr 2019 17:57:25 +0200
Subject: [PATCH] MDL-65175 mlbackend_php: Add missing checking for number of
 targets

---
 lib/mlbackend/php/classes/processor.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/mlbackend/php/classes/processor.php b/lib/mlbackend/php/classes/processor.php
index 016e86c96bb..063c44db96d 100644
--- a/lib/mlbackend/php/classes/processor.php
+++ b/lib/mlbackend/php/classes/processor.php
@@ -291,11 +291,15 @@ class processor implements \core_analytics\classifier, \core_analytics\regressor
 
         // We need at least 2 samples belonging to each target.
         $counts = array_count_values($targets);
+        $ntargets = count(explode(',', $metadata['targetclasses']));
         foreach ($counts as $count) {
             if ($count < 2) {
                 $notenoughdata = true;
             }
         }
+        if ($ntargets > count($counts)) {
+            $notenoughdata = true;
+        }
         if (!empty($notenoughdata)) {
             $resultobj = new \stdClass();
             $resultobj->status = \core_analytics\model::NOT_ENOUGH_DATA;