Unable to sort prefixes by VLAN name/ID (regardless of site)

[markkuleinio]

Deployment Type

Self-hosted

Triage priority

N/A

NetBox Version

v4.1.10

Python Version

3.11

Steps to Reproduce

1. Create two sites: Site1 and Site2
2. Create two VLANs for Site1: 111 (VLAN111) and 222 (VLAN222)
3. Create two VLANs for Site2: 111 (VLAN111) and 222 (VLAN222)
4. Create four prefixes:
   1. 10.1.111.0/24, Site1, VLAN111
   2. 10.1.222.0/24, Site1, VLAN222
   3. 10.2.111.0/24, Site2, VLAN111
   4. 10.2.222.0/24, Site2, VLAN222
5. Go to Prefixes list and click the VLAN column to sort the prefixes by VLAN

Expected Behavior

The prefixes are shown sorted by the VLAN name/ID (as shown in the VLAN column).

Observed Behavior

The prefixes are shown sorted by some other data, not by the data shown in the VLAN column:

[bctiemann]

This can be addressed either by changing the PrefixTable.vlan field to represent the numeric VLAN ID rather than the Site-scoped VLAN obejct, or by adding another field to the table for that purpose in addition to keeping the existing VLAN field. I've posted a PR that does the former, but I'd like to gather some feedback about whether this would disrupt existing workflows or would be an appropriate and minimally cluttering change.