node.js - 如何在 Cloud9 中连接 MongoDB？

Question

我在Cloud9中连接数据库MongoDB有问题 请帮忙解决这个问题!

var MongoClient = require("mongodb").MongoClient;
var port = process.env.PORT;
var ip   = process.env.IP;
MongoClient.connect("mongodb://"+ip+":"+port+"/test",function(error,db){
        if(!error){
         console.log("We are connected");   
        }
        else{
         console.dir(error); //failed to connect to [127.4.68.129:8080]               
        }
});

输出:

Running Node Process
Your code is running at 'http://demo-project.alfared1991.c9.io'.
Important: use 'process.env.PORT' as the port and 'process.env.IP' as the host in your scripts!
[Error: failed to connect to [127.4.68.129:8080]]

Answer 1

如果你关注https://docs.c9.io/setting_up_mongodb.html通过此链接，您将在您的工作区下设置并运行您的 mongodb 守护进程。

如果你看一下 ./mongod 的输出，你会发现这个输出:

2015-08-22T12:46:47.120+0000 [initandlisten] MongoDB starting : pid=7699 port=27017 dbpath=data 64-bit host=velvetdeth-express-example-1804858

只需将主机和端口值复制到您的 mongodb 配置中，设置数据库 url，在本例中为:

mongodb://velvetdeth-express-example-1804858:27017