From 58f864abddd7db3578388b8734c6a7d5ce183a65 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs=20Pelay?=
 <45865185+jpelay@users.noreply.github.com>
Date: Wed, 30 Oct 2024 17:25:04 -0400
Subject: [PATCH] =?UTF-8?q?=F0=9F=AA=B2=20Fix=20view=20programs=20for=20no?=
 =?UTF-8?q?n=20students=20(#5903)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When trying to access a program from a user that's not in a class, the paged failed due to indexing an empty dictionary.

**How to test**

* Go to  http://localhost:8080/hedy/30bd4e4ce84f40bca40b24b9295e1483/view and it should open normally.
---
 app.py                           | 2 +-
 templates/view-program-page.html | 8 +++++---
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/app.py b/app.py
index 42b5e0dfcf8..7ed863310b9 100644
--- a/app.py
+++ b/app.py
@@ -1965,7 +1965,7 @@ def view_program(user, id):
                                level=int(result['level']),
                                code=code),
                            is_teacher=user['is_teacher'],
-                           class_id=student_customizations['id'],
+                           class_id=student_customizations.get('id'),
                            next_program_id=next_program_id,
                            next_classmate_program_id=next_classmate_adventure_id,
                            **arguments_dict)
diff --git a/templates/view-program-page.html b/templates/view-program-page.html
index 9945b2c5a51..477820676f4 100644
--- a/templates/view-program-page.html
+++ b/templates/view-program-page.html
@@ -34,9 +34,11 @@ <h1>{{initial_adventure.name}}</h1>
       {% if next_classmate_program_id %}
         <a class="green-btn" href="/hedy/{{ next_classmate_program_id }}/view">{{ _('next_student') }}</a>
       {% endif %}
-      <a class="green-btn" href="/for-teachers/class/{{ class_id }}">
-        {{_('back_to_class')}}
-      </a>
+      {% if class_id %}
+        <a class="green-btn" href="/for-teachers/class/{{ class_id }}">
+          {{_('back_to_class')}}
+        </a>
+      {% endif %}
     {% endif %}
   </div>
   <h2 class="p-0 m-0">{{_('level_title')}} {{level}}</h2>