From 01702e439e2c9b82901f647927510456cd800a92 Mon Sep 17 00:00:00 2001
From: wangyaqi <wangyaqi988@163.com>
Date: Mon, 20 Jan 2020 16:16:38 +0800
Subject: [PATCH] Update cf-database.md

---
 docs/uniCloud/cf-database.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/uniCloud/cf-database.md b/docs/uniCloud/cf-database.md
index de084610..fa29a791 100644
--- a/docs/uniCloud/cf-database.md
+++ b/docs/uniCloud/cf-database.md
@@ -607,13 +607,13 @@ collection.where({name: _.eq('hey')}).update({
 更新指令。用于设定字段等于指定值。这种方法相比传入纯 JS 对象的好处是能够指定字段等于一个对象：
 
 ```js
-// 以下方法只会更新 property.location 和 property.size，如果 property 对象中有
+const _ = db.command
 db.collection('photo').doc('doc-id').update({
   data: {
-    property: {
+    property: _.set({
       location: 'guangzhou',
       size: 8
-    }
+    })
   }
 }).then(function(res) {
   
-- 
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