fix value name and clarify messages

dnssync_perm.py

@@ -123,19 +123,19 @@ class NameZoneValidator(CustomValidator):
 
     def validate(self, ipaddress, request):
         dns_name = ipaddress.dns_name
-        #breakpoint()
         if dns_name == "":
             self.fail("DNS name can not be empty", field="dns_name")
 
         if dns_name.find(".") == -1:
             self.fail("DNS name must contain a zone", field="dns_name")
 
+        # This check is necessary because of the prefix-DNS view relation of dns_sync
         if not ipaddress_in_existing_prefix(ipaddress, request):
-            self.fail(f"IP address '{address}' is not in any existing prefix")
+            self.fail(f"IP address '{ipaddress}' is not in any existing prefix", field="address")
 
         if not prefix_has_dns_view(ipaddress, request):
-            self.fail(f"IP address '{address}' is in a prefix for which there is no DNS view defined. Ask NetBox administrator")
+            self.fail(f"IP address '{ipaddress}' is in a prefix for which there is no DNS view defined. Ask your NetBox administrator", field="address")
 
         if not name_has_valid_zone(dns_name, ipaddress, request):
-            self.fail(f"Name '{dns_name}' has an invalid zone name", field="dns_name")
+            self.fail(f"Name '{dns_name}' is in an non-existing zone name", field="dns_name")