TypeError when deleting a Rocknet

[phillxnet]

When deleting for example a docker network named "111", having just created it on a fresh system, using the System - Network (Rockstor 5.0.8-0 testing channel) page:

Network Connections

Name	UUID	Type	State	Docker name	Connection method	IP Address	Gateway	DNS Servers	DNS Search Domains	MTU
br-09b408c806a0	1f608a19-b2dc-4bff-a5fc-91a753870932	bridge	activated	111	manual	172.18.0.1/16	172.18.0.1			1500
docker0	9ee2ce17-bb38-4db3-b4cd-33306e3384af	bridge	activated	docker0	manual	172.17.0.1/16	172.17.0.1			1500
Wired connection 1	e9c4b86c-930e-3294-b9c7-f0aff0b3481f	ethernet	activated

The following error was observed:

[22/Mar/2024 15:36:17] ERROR [storageadmin.util:45] Exception: '>' not supported between instances of 'BridgeConnection' and 'int'
Traceback (most recent call last):
  File "/opt/rockstor/src/rockstor/rest_framework_custom/generic_view.py", line 41, in _handle_exception
    yield
  File "/opt/rockstor/src/rockstor/storageadmin/views/network.py", line 548, in delete
    if nco.bridgeconnection_set.first() > 0:  # If docker network
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: '>' not supported between instances of 'BridgeConnection' and 'int'

[FroggyFlox]

Linking to #2775 as any PR closing this issue should also close #2775.

[Hooverdan96]

Could this be done with another check whether the set is empty before handling the two cases?

    def delete(self, request, id):
        with self._handle_exception(request):
            nco = self._nco(request, id)
            if nco.bridgeconnection_set: # a bridgeconnection exists
                if nco.bridgeconnection_set.first() > 0:  # If docker network
                    brco = nco.bridgeconnection_set.first()
                    ... 
                    dnet_remove(network=brco.docker_name)
                else:
                    restricted = False
                    ...
                    self._delete_connection(nco)
            else: # no bridgeconnection exists, delete orphaned entry
                self._delete_connection(nco)

[phillxnet]

@Hooverdan96 I'm going to have a look at this and it's linked issue shortly if all goes well.
Re:

Could this be done with another check whether the set is empty before handling the two cases?

It may fix the linked issue #2775

TypeError: ‘>’ not supported between instances of ‘NoneType’ and ‘int’

though we may need an .exists().

But I suspect not the failure in this issue. I'll have to brush up what was intended here in the first place. Then likely yes we just need an additional check of sorts.

[FroggyFlox]

If I remember correctly, this is only there to check if the NetworkConnection object has a related BridgeConnection, in which case it means it has docker networks that need to be disconnected from their containers.
I remember taking this construct from elsewhere (within the same class maybe?) so I hope there isn't an issue with these other instances as well.

[phillxnet]

Reproducer Rocknet expanded:

[phillxnet]

@FroggyFlox & @Hooverdan96
Just looking at a simple fix by way of replacing what looks like it should have been .count() > 0 with a basic query .exists().

Take a look at the associated PR. Now testing to see if this also fixes the missing network card issue originally created by @Hooverdan96, and linked to by @FroggyFlox :

"Cannot delete physically absent network card entry using WebUI" #2775

Which is a little more tricky to setup a reproducer for.

[phillxnet]

Closing as:
Fixed by #2817