'safe' loading of links

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

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>