From edaf017ab1bb51a98a297bd3bdd4e130aefd99c5 Mon Sep 17 00:00:00 2001
From: Fine <fanxue0830@gmail.com>
Date: Fri, 18 Oct 2024 13:24:06 +0800
Subject: [PATCH] fix

---
 .../widget/graph-styles/components/ValueMappings.vue           | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/views/dashboard/configuration/widget/graph-styles/components/ValueMappings.vue b/src/views/dashboard/configuration/widget/graph-styles/components/ValueMappings.vue
index 9c45ddd7..99d2ae90 100644
--- a/src/views/dashboard/configuration/widget/graph-styles/components/ValueMappings.vue
+++ b/src/views/dashboard/configuration/widget/graph-styles/components/ValueMappings.vue
@@ -56,6 +56,9 @@ limitations under the License. -->
     }
     delete valueMappings.value[list[index]];
     keys.value = Object.keys(valueMappings.value);
+    if (!keys.value.length) {
+      keys.value = [""];
+    }
     updateConfig();
   }