From 97d4f6d4edfde231fe2e2c5cc2a0297b29d2ebb6 Mon Sep 17 00:00:00 2001
From: Dani Palou <dani@moodle.com>
Date: Tue, 29 Jan 2019 13:03:31 +0100
Subject: [PATCH] MOBILE-2844 assign: Fix prefetch error if grader was -1

---
 src/addon/mod/assign/providers/prefetch-handler.ts | 2 +-
 src/core/user/providers/user.ts                    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/addon/mod/assign/providers/prefetch-handler.ts b/src/addon/mod/assign/providers/prefetch-handler.ts
index d7a86836a..93ecb3f68 100644
--- a/src/addon/mod/assign/providers/prefetch-handler.ts
+++ b/src/addon/mod/assign/providers/prefetch-handler.ts
@@ -392,7 +392,7 @@ export class AddonModAssignPrefetchHandler extends CoreCourseActivityPrefetchHan
         // Prefetch feedback.
         if (submission.feedback) {
             // Get profile and image of the grader.
-            if (submission.feedback.grade && submission.feedback.grade.grader) {
+            if (submission.feedback.grade && submission.feedback.grade.grader && submission.feedback.grade.grader != -1) {
                 userIds.push(submission.feedback.grade.grader);
             }
 
diff --git a/src/core/user/providers/user.ts b/src/core/user/providers/user.ts
index 2a4d83d47..242c586d6 100644
--- a/src/core/user/providers/user.ts
+++ b/src/core/user/providers/user.ts
@@ -397,7 +397,7 @@ export class CoreUserProvider {
             userId = Number(userId); // Make sure it's a number.
 
             // Prevent repeats and errors.
-            if (!isNaN(userId) && !treated[userId]) {
+            if (!isNaN(userId) && !treated[userId] && userId > 0) {
                 treated[userId] = true;
 
                 promises.push(this.getProfile(userId, courseId, false, siteId).then((profile) => {