1.問題展示

image.png

代碼

var mongoose=require("mongoose");
 var dbUrl = config.URL;

mongoose.connect(dbUrl);//連接數(shù)據(jù)庫
 
mongoose.connection.on('error',function(err){
    if(err){
       console.log("數(shù)據(jù)庫連接失?。? + error);
    }
});
mongoose.connection.on('open',function(){
    console.log("------數(shù)據(jù)庫連接成功！------");
});

2.問題原因

(node:3564) DeprecationWarning: `open()` is deprecated in mongoose >= 4.11.0, use `openUri()` instead, or set the `useMongoClient` option if using `connect()` or `createConnection()`. See http://mongoosejs.com/docs/4.x/docs/connections.html#use-mongo-client

3.解決方案

對操作沒影響，但本人有強(qiáng)迫癥
可以改成：

var mongoose=require("mongoose");
 var dbUrl = config.URL;

mongoose.connect(dbUrl,{useMongoClient: true});//連接數(shù)據(jù)庫 

mongoose.connection.on('error',function(err){
    if(err){
       console.log("數(shù)據(jù)庫連接失?。? + error);
    }
});
mongoose.connection.on('open',function(){
    console.log("------數(shù)據(jù)庫連接成功！------");
});