Backport/2.5/39027 (#39091)

* nios lookup errors out when there are no results #37970 (#39027)

* Update nios.py

* Update nios.py

* Update nios.py

* nios lookup errors out when there are no results #37970  Open

Indentation failure issue resolved

* Returning empty list instead of None

In case of no results, res will be returned as an empty list instead of None (implementing ganeshrn comment)

(cherry picked from commit fd50248463)

* Adding changelog mesage for nios lookup error

changelogs/fragments/nios_lookup_errors.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- nio_lookup_error - fixed nios lookup errors out when there are no results 

lib/ansible/plugins/lookup/nios.py

@@ -114,7 +114,10 @@ class LookupModule(LookupBase):
         provider = kwargs.pop('provider', {})
         wapi = WapiLookup(provider)
         res = wapi.get_object(obj_type, filter_data, return_fields=return_fields)
-        for obj in res:
-            if 'extattrs' in obj:
-                obj['extattrs'] = flatten_extattrs(obj['extattrs'])
+        if res is not None:
+            for obj in res:
+                if 'extattrs' in obj:
+                    obj['extattrs'] = flatten_extattrs(obj['extattrs'])
+        else:
+            res = []
         return res