From fa36bcdbca22153e58066678c7bd46426d945a85 Mon Sep 17 00:00:00 2001
From: Matthias <matthias.mair@oewf.org>
Date: Thu, 11 Nov 2021 13:00:20 +0100
Subject: [PATCH] 'safe' loading of links

---
 InvenTree/part/templatetags/plugin_extras.py | 10 ++++++++++
 InvenTree/templates/navbar.html              |  5 ++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/InvenTree/part/templatetags/plugin_extras.py b/InvenTree/part/templatetags/plugin_extras.py
index c5e86a6900..51a115b67e 100644
--- a/InvenTree/part/templatetags/plugin_extras.py
+++ b/InvenTree/part/templatetags/plugin_extras.py
@@ -4,6 +4,7 @@
 """
 from django.conf import settings as djangosettings
 from django import template
+from django.urls import reverse
 
 from common.models import InvenTreeSetting
 
@@ -35,3 +36,12 @@ def navigation_enabled(*args, **kwargs):
     if djangosettings.TESTING:
         return True
     return InvenTreeSetting.get_setting('ENABLE_PLUGINS_NAVIGATION')
+
+
+@register.simple_tag()
+def safe_url(view_name, *args, **kwargs):
+    """ safe lookup for urls """
+    try:
+        return reverse(view_name, args=args, kwargs=kwargs)
+    except:
+        return None
diff --git a/InvenTree/templates/navbar.html b/InvenTree/templates/navbar.html
index cd2a2a0a56..02f7b2e6b7 100644
--- a/InvenTree/templates/navbar.html
+++ b/InvenTree/templates/navbar.html
@@ -70,7 +70,10 @@
             </a>
             <ul class='dropdown-menu'>
              {% for nav_item in plugin.navigation %}
-                <li><a href="{% url nav_item.link %}" class="dropdown-item"><span class='{{nav_item.icon}} icon-header'></span>{{nav_item.name}}</a>
+                {% safe_url nav_item.link as nav_link %}
+                {% if nav_link %}
+                <li><a href="{{ nav_link }}" class="dropdown-item"><span class='{{nav_item.icon}} icon-header'></span>{{nav_item.name}}</a>
+                {% endif %}
              {% endfor %}
             </ul>
           </li>