API endpoint : custom-fields with multiple filters bug

[Flocon29]

NetBox version

v3.0.7

Python version

3.8

Steps to Reproduce

1. Create 2 custom-fields (foo & bar)
2. Execute HTTP request to API endpoint :

http://netbox_instance:8080/api/extras/custom-fields/?name=foo&name=bar

Expected Behavior

The expected result is the list of all the custom-fields matching with the filters.
Here foo & bar

Observed Behavior

We receive only the last element bar and not both.

[Flocon29]

A discussion has been opened on this subject : #7543

The behavior for requesting config-contexts is correct :

http://netbox_instance:8080//api/extras/config-contexts/?name=foo&name=bar

But the behavior is not that expected for custom-fields

[jeremystretch]

Looks like CustomFieldFilterSet doesn't inherit from BaseFilterSet, which is what provides support for multi-value matches as above.