TypeError: 'NoneType' object is not subscriptable when search returns zero results (v4.4.0) #685
Description
NetBox version
v4.4.7
Topology Views version
4.4.0
Steps to Reproduce
Environment:
- Python version: 3.12.3
- NetBox version: 4.4.7
- netbox_topology_views version: 4.4.0
- Plugins installed: netbox_dns: 1.4.4, netbox_floorplan: 0.8.0, netbox_qrcode: 0.0.19, netbox_reorder_rack: 1.1.4, netbox_topology_views: 4.4.0, slurpit_netbox: 1.2.7
- Deployment: Docker
Steps to Reproduce:
Navigate to the Topology Views page (/plugins/netbox_topology_views/topology/).
Use the filter/search sidebar to enter criteria that will explicitly return zero results (e.g., search for a non-existent device name).
Hit "Enter" or run the search.
Expected Behavior
The plugin should display an empty topology map with a message like "No devices found matching your criteria" or "No nodes to display".
Observed Behavior
A Django "Internal Server Error" page is displayed.
Traceback:
Internal Server Error: /plugins/netbox_topology_views/topology/
Traceback (most recent call last):
File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/handlers/exception.py", line 55, in inner
response = get_response(request)
^^^^^^^^^^^^^^^^^^^^^
File "/opt/netbox/venv/lib/python3.12/site-packages/django/core/handlers/base.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/netbox/venv/lib/python3.12/site-packages/django/views/generic/base.py", line 105, in view
return self.dispatch(request, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/netbox/venv/lib/python3.12/site-packages/django/contrib/auth/mixins.py", line 109, in dispatch
return super().dispatch(request, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/netbox/venv/lib/python3.12/site-packages/django/views/generic/base.py", line 144, in dispatch
return handler(request, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/netbox/venv/lib/python3.12/site-packages/netbox_topology_views/views.py", line 832, in get
if not topo_data["nodes"]:
~~~~~~~~~^^^^^^^^^
TypeError: 'NoneType' object is not subscriptable