From 407bd2d619751a14c6331b07efa6ada57db7db0e Mon Sep 17 00:00:00 2001
From: Peter Holmberg <peterholmberg@users.noreply.github.com>
Date: Wed, 16 Jun 2021 14:11:36 +0200
Subject: [PATCH] Alerting: Don't reset value when changing evaluator method on
 classic condition (#35750)

---
 public/app/features/expressions/components/Condition.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/public/app/features/expressions/components/Condition.tsx b/public/app/features/expressions/components/Condition.tsx
index dd2a8129a3d..2987a2aaa04 100644
--- a/public/app/features/expressions/components/Condition.tsx
+++ b/public/app/features/expressions/components/Condition.tsx
@@ -44,7 +44,7 @@ export const Condition: FC<Props> = ({ condition, index, onChange, onRemoveCondi
   const onEvalFunctionChange = (evalFunction: SelectableValue<EvalFunction>) => {
     onChange({
       ...condition,
-      evaluator: { params: [], type: evalFunction.value! },
+      evaluator: { params: condition.evaluator.params, type: evalFunction.value! },
     });
   };