Closes #8805: Add "mixed" option for device airflow indication

docs/release-notes/version-3.2.md

@@ -4,6 +4,7 @@
 
 ### Enhancements
 
+* [#8805](https://github.com/netbox-community/netbox/issues/8805) - Add "mixed" option for device airflow indication
 * [#8894](https://github.com/netbox-community/netbox/issues/8894) - Include full names when listing users
 * [#8998](https://github.com/netbox-community/netbox/issues/8998) - Enable filtering racks & reservations by site group
 * [#9122](https://github.com/netbox-community/netbox/issues/9122) - Introduce `clearcache` management command & clear cache during upgrade

netbox/dcim/choices.py

@@ -159,6 +159,7 @@ class DeviceAirflowChoices(ChoiceSet):
     AIRFLOW_RIGHT_TO_LEFT = 'right-to-left'
     AIRFLOW_SIDE_TO_REAR = 'side-to-rear'
     AIRFLOW_PASSIVE = 'passive'
+    AIRFLOW_MIXED = 'mixed'
 
     CHOICES = (
         (AIRFLOW_FRONT_TO_REAR, 'Front to rear'),
@@ -167,6 +168,7 @@ class DeviceAirflowChoices(ChoiceSet):
         (AIRFLOW_RIGHT_TO_LEFT, 'Right to left'),
         (AIRFLOW_SIDE_TO_REAR, 'Side to rear'),
         (AIRFLOW_PASSIVE, 'Passive'),
+        (AIRFLOW_MIXED, 'Mixed'),
     )