Fixes #2704: Fix form select widget population on parent with null value

CHANGELOG.md

@@ -10,6 +10,7 @@ v2.5.2 (FUTURE)
 * [#2673](https://github.com/digitalocean/netbox/issues/2673) - Fix exception on LLDP neighbors view for device with a circuit connected
 * [#2691](https://github.com/digitalocean/netbox/issues/2691) - Cable trace should follow circuits
 * [#2698](https://github.com/digitalocean/netbox/issues/2698) - Remove pagination restriction on bulk component creation for devices/VMs
+* [#2704](https://github.com/digitalocean/netbox/issues/2704) - Fix form select widget population on parent with null value
 * [#2707](https://github.com/digitalocean/netbox/issues/2707) - Correct permission evaluation for circuit termination cabling
 * [#2712](https://github.com/digitalocean/netbox/issues/2712) - Preserve list filtering after editing objects in bulk
 

netbox/project-static/js/forms.js

@@ -100,7 +100,7 @@ $(document).ready(function() {
                     } else if (filter_field.val()) {
                         rendered_url = rendered_url.replace(match[0], filter_field.val());
                     } else if (filter_field.attr('nullable') == 'true') {
-                        rendered_url = rendered_url.replace(match[0], '0');
+                        rendered_url = rendered_url.replace(match[0], 'null');
                     }
                 }