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

mongoose.connect('mongodb://localhost/test');
报错:
(node:2752) 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/connections.html#use-mongo-client
解决:
mongoose.connect('mongodb://localhost/test',{useMongoClient: true});