mongoose 连接问题

var mongoose= require('mongoose');

mongoose.connect('mongodb://localhost/chat');

这样连接报错

DeprecationWarning: `open()` is deprecated in mongoose >= 4.11.0，use `openUri()` instead, or set the `useMongoClient` option if using `connect()` or `createConnection()`

简单的解决办法：

用：

mongoose.connect('mongodb://localhost/chat',{useMongoClient:true});

替换：

mongoose.connect('mongodb://localhost/chat');即可