[fix] Return from task if WhoIs exists

There was an issue that the task was triggered
for a device whose last_ip is updated but without
checking if we already have WhoIs for the latest
ip. Have added a check to return from the task
if that is the case.

Signed-off-by: DragnEmperor <[email protected]>

Author: DragnEmperor

openwisp_controller/config/who_is/service.py

@@ -209,6 +209,12 @@ def fetch_who_is_details(self, device_pk, initial_ip_address, new_ip_address):
         Fetches the WhoIs details of the given IP address
         and creates/updates the WhoIs record.
         """
+        # The task will be triggered if last_ip is updated without
+        # checking if WhoIs is present for the new IP address, so
+        # we return here if WhoIs is present for new IP address.
+        if self._get_who_is_info_from_db(new_ip_address):
+            return
+        
         WhoIsInfo = load_model("config", "WhoIsInfo")
 
         try: