fix #55

mirzaev/ebala/system/models/task.php

@@ -145,8 +145,8 @@ final class task extends core
 					<<<AQL
 						FOR task IN %s
 							%s
-							LET worker = (FOR worker in %s FILTER worker.id LIKE task.worker SORT worker.created DESC, worker.id DESC  LIMIT 1 RETURN worker)[0]
-							LET market = (FOR market in %s FILTER market.id LIKE task.market SORT market.created DESC, market.id DESC LIMIT 1 RETURN market)[0]
+							LET worker = (FOR worker in %s FILTER worker.id != null && worker.id LIKE task.worker SORT worker.created DESC, worker.id DESC  LIMIT 1 RETURN worker)[0]
+							LET market = (FOR market in %s FILTER market.id != null && market.id LIKE task.market SORT market.created DESC, market.id DESC LIMIT 1 RETURN market)[0]
 							%s
 							SORT %s
 							LIMIT %d, %d