# NetBox v2.12 ## v2.12-beta1 (FUTURE) ### Enhancements * [#5806](https://github.com/netbox-community/netbox/issues/5806) - Add kilometer and mile as choices for cable length unit ### Other Changes * [#5532](https://github.com/netbox-community/netbox/issues/5532) - Drop support for Python 3.6 * [#5994](https://github.com/netbox-community/netbox/issues/5994) - Drop support for `display_field` argument on ObjectVar ### REST API Changes * dcim.Device * Removed the `display_name` attribute (use `display` instead) * dcim.DeviceType * Removed the `display_name` attribute (use `display` instead) * dcim.Rack * Removed the `display_name` attribute (use `display` instead) * extras.ContentType * Removed the `display_name` attribute (use `display` instead) * ipam.VLAN * Removed the `display_name` attribute (use `display` instead) * ipam.VRF * Removed the `display_name` attribute (use `display` instead)