fix AttributeError: 'CircuitTermination' object has no attribute 'device'

[mattieserver]

when you enable the Circuit Termination you may see the following error: AttributeError: 'CircuitTermination' object has no attribute 'device' Also see #20

[mattieserver]

@martydingo , can you check if your issue is resolved?

[mattieserver]

#24 added more NoneType checks

[martydingo]

Right, it's not erroring but I'm not seeing the circuit between a patch panel and a router, so it goes from router -> 24 LC patch panel (unnamed) then to a circuit, then lands at another DC on a router.

I had to redact a fair amount here, sorry.

I'm expecting the red to display, and this would then connect our sites up.

[mattieserver]

Thanks for the info, I understand that you have to redact some info. I believe the 'issue' now is that i did not include any checks for patch panels. I will check if i can add support for patch panels.

[martydingo]

Well people should be putting things like circuits into patch panels as standard, unless it's just the one circuit being used as a WAN, that I can understand.

Thanks very much!

On Wed, May 20, 2020 at 8:48 AM mattieserver [email protected] wrote:

Thanks for the info, I understand that you have to redact some info. I believe the 'issue' now is that i did not include any checks for patch panels. I will check what if i can add support for patch panels.

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[martydingo]

Is there any progress on this?

[mattieserver]

I did not find the time yet.

[Bah27]

Hello , what is the difference between the colors on the edges.

[mattieserver]

Nothing, it takes the colour you used for the cable in netbox itself. Same with the devices, it takes the colour of the device role.

[Bah27]

thank you for your quick response

[mskalecki]

The plugin crashes with this exception if you have a cable with termination_a connected to a device and termination_b connected to a circuit.

This line is the culprit (it assumes that link.termination_b.device exists: https://github.com/mattieserver/netbox-topology-views/blob/0b6df3bd2807df301cb660f953ed860ba996144f/netbox_topology_views/views.py#L163

The fix is to add the check: elif link.termination_a.device.id in device_ids and hasattr(link.termination_b, 'device') and link.termination_b.device.id in device_ids:

[candlerb]

I still get this problem with NTV 2.0.1 under Netbox 3.2.9:

...
Oct 19 19:02:23 noc gunicorn[1795]:   File "/opt/netbox-3.2.9/venv/lib/python3.10/site-packages/netbox_topology_views/views.py", line 291
, in get
Oct 19 19:02:23 noc gunicorn[1795]:     topo_data = get_topology_data(self.queryset, hide_unconnected, intermediate_dev_role_ids, end2end
_connections)
Oct 19 19:02:23 noc gunicorn[1795]:   File "/opt/netbox-3.2.9/venv/lib/python3.10/site-packages/netbox_topology_views/views.py", line 156
, in get_topology_data
Oct 19 19:02:23 noc gunicorn[1795]:     elif link.termination_a.device.id in device_ids and link.termination_b.device.id in device_ids:
Oct 19 19:02:23 noc gunicorn[1795]: AttributeError: 'CircuitTermination' object has no attribute 'device'

The fix given by @mskalecki prevents the error, thank you!

~~(OTOH I am not seeing any devices at all, regardless of what filters I select; but that's a different problem)~~ Oops, I had forgotten collectstatic

[candlerb]

Actually that fix doesn't work in the following scenario:

• Device A interface A'
• --- cable --->
• CircuitTermination (A side)
• --- circuit C --->
• CircuitTermination (Z side)
• --- cable --->
• Device B interface B'

In this situation, with NTV 2.0.3, I find there is no link shown between device A and B, regardless of whether "Display end-to-end connections" is checked.

I'm not sure if such a circuit connection is expected to be shown, and if so, how it should be rendered. I notice the example image on the README.md page shows a dotted line, but I'm not sure if that's a circuit or something else.

[dreng]

@candlerb Since end-to-end connections has been reimplemented in the meantime, would you please check if the issue is solved for you now? If not, please provide the exact steps to reproduce this bug.

[candlerb]

I am testing git+https://github.com/mattieserver/netbox-topology-views@master now.

A few minor comments while I did this:

• I was a bit surprised at first to see all devices floating and unconnected. This is because neither "Show cables" nor "Show logical connections" is selected by default. I think one of them should be active by default (probably "Show cables"). Some ideas:
  • It would perhaps be reasonable to invert this to "Hide cables", given that there's already "Hide unconnected".
  • Is it useful in practice to be able to show both cables and logical connections simultaneously, or topology without either type of connection? If not, then this could simplify to a radio button pair. Or even a single checkbox "show logical connections" which means "show logical connections instead of cables".
  • Otherwise, if you're keeping two checkboxes, I think it would be good if "Show cables" and "Show logical connections" were adjacent to each other
• When I select both "Hide unconnected" and "Show logical connections", for some reason the icons don't display:

But without "Hide unconnected" it's fine:

Now, back to the initial issue around circuits. With "Show circuit terminations" and "Show Cables" (or "Show Logical Connections"), it's now working:

In fact, "Show circuit terminations" without either Show Cables or Show Logical Connections is also fine:

So I think this issue is good to close now - thank you!

[dreng]

Thank you for your detailed feedback! I'm going to close this issue then.

All other things should be addressed in a seperate bug report, but just to give a quick feedback:

• Unconnected devices: This has been reported already regarding the topology button in "Sites" (#237 ). We could provide a very quick fix, but I'm planning to change some related parts anyway and therefore I leave it like it is for now.
• Hide cables: Disagree. I'd rather change "hide unconnected" to "show unconnected" in order to have the same logic in all checkboxes. See also #238.
• Show both: We discussed this in the PR #188 and finally left the decision to the user. Each combination might be useful. There's also a config file option "hide_single_cable_logical_conns" which prevents redundancy with cables and logical connections.

[dreng]

* When I select both "Hide unconnected" and "Show logical connections", for some reason the icons don't display:

I wasn't able to reproduce this. My result if I tick both options: