Exception when search for rack position without defining a rack

[rodvand]

NetBox version

v3.2.0-beta2

Python version

3.8

Steps to Reproduce

1. Find a device not racked
2. Edit the device
3. Do not select a rack, but go to rack position and start a search

Expected Behavior

Expect not to be "allowed" to search for a rack position without defining a rack.

Observed Behavior

See an error banner showing parts of an exception.

It seems that the search for a rack position uses the URL https://beta-demo.netbox.dev/api/dcim/racks/{{ rack }}/elevation/?brief=true&exclude=109&q=12 which mess up the request.

[jeremystretch]

This is reproducible on v3.1.9