Fixed navbar to not allow "root" user to access preferences (root user

will never own services)

server/src/uds/core/managers/UserPrefsManager.py

@@ -124,8 +124,11 @@ class UserPrefsManager(object):
                 logger.debug(name)
                 prefs.append({'module': mod, 'name': p.getName(), 'value': form.cleaned_data[name]})
         user.preferences.all().delete()
+        try:
             for p in prefs:
                 user.preferences.create(module=p['module'], name=p['name'], value=p['value'])
+        except Exception:  # User does not exists
+            logger.info('Trying to dave user preferences failed (probably root user?)')
         return None
 
     def processGuiForUserPreferences(self, user, data):

server/src/uds/templates/uds/html5/snippets/navbar.html

@@ -1,5 +1,6 @@
 {% load i18n html5 static %}
     {% preferences_allowed as show_prefs %}
+    {% root_id as rootid %}
  		<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
 			<!-- Brand and toggle get grouped for better mobile display -->
 			<div class="navbar-header">
@@ -37,7 +38,7 @@
                   <li class="dropdown">
                     <a href="#" class="dropdown-toggle" data-toggle="dropdown"><i class="fa fa-user"></i> {{ user.real_name }} <b class="caret"></b></a>
                     <ul class="dropdown-menu">
-                        {% if show_prefs %}
+                        {% if show_prefs and user.id != rootid %}
                         <li><a href="{% url "uds.web.views.prefs" %}"><span class="fa fa-edit"></span> {% trans 'Preferences' %}</a></li>
                         {% endif %}
                     {% if user.staff_member or user.is_admin %}

server/src/uds/templatetags/html5.py

@@ -34,6 +34,7 @@ from __future__ import unicode_literals
 
 from django import template
 from uds.core.util import html
+from uds.core.auths.auth import ROOT_ID
 from uds.core.util.Config import GlobalConfig
 from uds.models.Image import Image
 
@@ -95,6 +96,11 @@ def preferences_allowed():
     return GlobalConfig.PREFERENCES_ALLOWED.getBool(True)
 
 
+@register.assignment_tag
+def root_id():
+    return ROOT_ID
+
+
 @register.assignment_tag
 def image_size():
     return Image.MAX_IMAGE_SIZE