From 9f1beac871254cfb4511f12f5df4d32b7942e8fa Mon Sep 17 00:00:00 2001
From: lvxiaojiao <lvxiaojiao@baidu.com>
Date: Fri, 22 Sep 2023 16:12:58 +0800
Subject: [PATCH] =?UTF-8?q?fix:Select=E5=80=BC=E4=B8=8D=E5=8F=98=E6=97=B6?=
 =?UTF-8?q?=E4=B8=8D=E5=BA=94=E8=A7=A6=E5=8F=91change?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 packages/amis-ui/src/components/Select.tsx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/amis-ui/src/components/Select.tsx b/packages/amis-ui/src/components/Select.tsx
index 90cad312b..63c705d94 100644
--- a/packages/amis-ui/src/components/Select.tsx
+++ b/packages/amis-ui/src/components/Select.tsx
@@ -675,7 +675,10 @@ export class Select extends React.Component<SelectProps, SelectState> {
         simpleValue ? selection.map(item => item[valueField]) : selection
       );
     } else {
-      onChange(simpleValue ? selectItem[valueField] : selectItem);
+      // Downshift里面的判断修改后的值是否相等时，没有区分是否多选，且用的是！==，所以这里拦截一下
+      (!selection.length ||
+        selection[0][valueField] !== selectItem[valueField]) &&
+        onChange(simpleValue ? selectItem[valueField] : selectItem);
     }
   }