From ce99f1fa5a1e8ef8c3f8bedd53c071b3e94f1446 Mon Sep 17 00:00:00 2001
From: David Monllao <david.monllao@gmail.com>
Date: Thu, 7 Sep 2017 07:52:56 +0200
Subject: [PATCH] MDL-59657 analytics: No predictions until training is
 completed

---
 admin/tool/analytics/model.php | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/admin/tool/analytics/model.php b/admin/tool/analytics/model.php
index b2268f166fe41..6d64c428c6750 100644
--- a/admin/tool/analytics/model.php
+++ b/admin/tool/analytics/model.php
@@ -161,8 +161,13 @@
 
         // Looks dumb to get a new instance but better be conservative.
         $model = new \core_analytics\model($model->get_model_obj());
-        $predictresults = $model->predict();
-        $predictlogs = $model->get_analyser()->get_logs();
+        if ($model->is_trained()) {
+            $predictresults = $model->predict();
+            $predictlogs = $model->get_analyser()->get_logs();
+        } else {
+            $predictresults = false;
+            $predictlogs = array();
+        }
 
         $renderer = $PAGE->get_renderer('tool_analytics');
         echo $renderer->render_get_predictions_results($trainresults, $trainlogs, $predictresults, $predictlogs);