Mongodb：第一次连接时无法连接到服务器

我得到以下错误：

Warning { MongoError: failed to connect to server [mongodb:27017] on first connect at Pool.<anonymous> (/Users/michaelks/Desktop/users/node_modules/mongodb-core/lib/topologies/server.js:325:35) at emitOne (events.js:96:13) at Pool.emit (events.js:188:7) at Connection.<anonymous> (/Users/michaelks/Desktop/users/node_modules/mongodb-core/lib/connection/pool.js:270:12) at Connection.g (events.js:292:16) at emitTwo (events.js:106:13) at Connection.emit (events.js:191:7) at Socket.<anonymous> (/Users/michaelks/Desktop/users/node_modules/mongodb-core/lib/connection/connection.js:173:49) at Socket.g (events.js:292:16) at emitOne (events.js:96:13) at Socket.emit (events.js:188:7) at connectErrorNT (net.js:1025:8) at _combinedTickCallback (internal/process/next_tick.js:74:11) at process._tickCallback (internal/process/next_tick.js:98:9) name: 'MongoError', message: 'failed to connect to server [mongodb:27017] on first connect' } 

即使我在运行Mongo的terminal窗口中得到这个：

 2016-12-25T03:45:23.715+0100 I NETWORK [initandlisten] connection accepted from 127.0.0.1:58868 #8 (8 connections now open) 

看起来有点关系

我已经尝试了两个

 $ mongod 

和

 $ brew services start mongo 

这是我的test_helper.js

 const mongoose = require('mongoose'); mongoose.connect('mongodb:localhost/users_test'); mongoose.connection .once('open', () => console.log('Good to go!')) .on('error', (error) => { console.warn('Warning', error); }); 

我没有具体做数据库“users_test”，因为我的印象是mongoose或mongo或两者都会在飞行中这样做。

我已经尝试了“localhost”和“127.0.0.1”。 我在OSX 10.11.5我正在运行Node 7.3.0和Mongo 3.2.9

我究竟做错了什么？ 我怎么知道有什么问题？

Answer 1

要用mongoose 连接到mongodb ，可以使用：

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

要么

 mongoose.connect('localhost/users_test'); 

要么

 mongoose.connect('localhost','users_test'); 

但不是mongoose.connect('mongodb:localhost/users_test'); ，它不匹配正确的主机名（ mongodb而不是localhost ）

Answer 2

我遇到这个问题的时间，这里是一些troubleshooting list

1. 确保database path exist ， C:\data\db中的窗口中的默认path
2. 确保mongo is running ，运行到C:\Program Files\MongoDB\Server\3.4\bin并运行以下命令：
   1. mongod.exe
   2. mongo.exe
3. 确保你的connection string is correct比如mongdb://localhost/database-name

Answer 3

变

 mongodb://localhost:27071/local 

至

 localhost/local 

而错误消失了