Adds Region.comments field in the required locations

- [x] 1. Add the field to the model class
- [x] 2. Generate and run database migrations
- [NA] 3. Add validation logic to clean()
- [NA] 4. Update relevant querysets
- [x] 5. Update API serializer
- [ ] 6. Add fields to forms
    - [x] dcim.forms.model_forms.RegionForm, create/edit (e.g. model_forms.py)
    - [x] dcim.forms.buld_edit.RegionBulkEditForm, bulk edit
    - [x] dcim.dorms.bulk_import.RegionImportForm, CSV import
    - [NA] filter (UI and API)
- [x] 7. Extend object filter set
- [x] 8. Add column to object table
- [x] 9. Update the SearchIndex
- [x] 10. Update the UI templates
- [x] 11. Create/extend test cases
    - [NA] models
    - [x] views
    - [NA] forms
    - [x] filtersets
    - [x] api
- [NA] 12. Update the model's documentation

netbox/dcim/filtersets.py

@@ -110,6 +110,15 @@ class RegionFilterSet(OrganizationalModelFilterSet, ContactModelFilterSet):
         model = Region
         fields = ('id', 'name', 'slug', 'description')
 
+    def search(self, queryset, name, value):
+        if not value.strip():
+            return queryset
+        return queryset.filter(
+            Q(name__icontains=value) |
+            Q(description__icontains=value) |
+            Q(comments__icontains=value)
+        ).distinct()
+
 
 class SiteGroupFilterSet(OrganizationalModelFilterSet, ContactModelFilterSet):
     parent_id = django_filters.ModelMultipleChoiceFilter(