連接錯誤（錯誤） - 在expressjs框架中使用nodejs的Mongodb連接

Question

現在在nodejs中進行培訓，以及如何使用nodejs和expressjs作爲框架開發MVC應用程序。我有TDD方法以及與TDD測試腳本一起編寫的Model和View類。我有一個MongoDB的測試腳本，也未能與以下錯誤信息：用茉莉花節點作爲測試包

expressjs_multech_project mul$ jasmine-node ./tests 
.......F 

Failures: 

    1) MongoDB is there a server running? 
    Message: 
    Expected { } to be null. 
    Stacktrace: 
    Error: Expected { } to be null. 
    at /Users/.../expressjs_multech_project/tests/mongodb.spec.js:6:19 
    at /Users/.../expressjs_multech_project/node_modules/mongodb/lib/mongodb/mongo_client.js:334:20 
    at /Users/.../expressjs_multech_project/node_modules/mongodb/lib/mongodb/db.js:258:16 
    at null.<anonymous> (/Users/.../expressjs_multech_project/node_modules/mongodb/lib/mongodb/connection/server.js:621:7) 
    at emitThree (events.js:110:13) 
    at emit (events.js:188:7) 
    at null.<anonymous> (/Users/.../expressjs_multech_project/node_modules/mongodb/lib/mongodb/connection/connection_pool.js:139:15) 
    at emitTwo (events.js:100:13) 

Finished in 0.182 seconds 
8 tests, 18 assertions, 1 failure, 0 skipped 

Im和其他所有測試都通過了與剛剛寫入的模型和視圖類。我不明白爲什麼我的MongoDB的TDD腳本失敗有關MongoDB，當我npm start，它不會開始返回的app.js錯誤消息：

> node app.js 

Sorry, the server (mongodb) is not running 

我研究後面的堆棧跟蹤，並從我所看到的，與mongodb沒有聯繫，並且返回null。我檢查MongoDB中，以確保它的存在：

Johns-MacBook-Pro:expressjs_multech_project mul$ npm list mongodb 
multechanalytics@0.0.1 /Users/.../expressjs_multech_project 
└── mongodb@1.3.10 

我已經試過配發的補救措施，但沒有最新的工作。關於解決與服務器連接問題的任何想法，所以我可以繼續這個expressjs MVC培訓項目？

我的配置/ index.js看起來是這樣的：

var config = { 
    local: { 
     mode: 'local', 
     port: 3000, 
     mongo: { 
     host: '127.0.0.1', 
     port: 27017 
     } 
    }, 
    staging: { 
     mode: 'staging', 
     port: 4000, 
     mongo: { 
     host: '127.0.0.1', 
     port: 27017 
     } 
    }, 
    production: { 
     mode: 'production', 
     port: 5000, 
     mongo: { 
     host: '127.0.0.1', 
     port: 27017 
     } 
    } 
} 
module.exports = function(mode) { 
    //export module configuration making it available to all files in folder 
    return config[mode || process.argv[2] || 'local'] || config.local; 

這是我當我充實了package.json文件。OUPUTS和npm install mongodb --save後npm install

muls-MacBook-Pro:expressjs_multech_project jmulhall$ npm install mongodb --save 

> kerberos@0.0.11 install /Users/jmulhall/Documents/Web_Development/Express-Nodejs/expressjs_multech_project/node_modules/kerberos 
> (node-gyp rebuild 2> builderror.log) || (exit 0) 

    CXX(target) Release/obj.target/kerberos/lib/kerberos.o 

> bson@0.2.22 install /Users/jmulhall/Documents/Web_Development/Express-Nodejs/expressjs_multech_project/node_modules/bson 
> (node-gyp rebuild 2> builderror.log) || (exit 0) 

    CXX(target) Release/obj.target/bson/ext/bson.o 
multechanalytics@0.0.1 /Users/jmulhall/Documents/Web_Development/Express-Nodejs/expressjs_multech_project 
├─┬ less-middleware@0.1.12 
│ └─┬ less@1.4.2 
│ └─┬ request@2.69.0 
│  └─┬ bl@1.0.3 
│  └─┬ readable-stream@2.0.6 
│   └── isarray@1.0.0 
└─┬ mongodb@1.4.40 
    ├─┬ bson@0.2.22 
    │ └── nan@1.8.4 
    ├── kerberos@0.0.11 
    └─┬ readable-stream@2.0.6 
    └── isarray@1.0.0 

由於運行安裝蒙戈...

Answer 1

這看起來不像安裝時的錯誤，因爲組件返回exit 0這很好。

需要明確的是，雖然您正在安裝的軟件包是唯一的官方MongoDB的驅動https://www.npmjs.com/package/mongodb - The official MongoDB driver for Node.js. Provides a high-level API on top of mongodb-core that is meant for end users.

您需要安裝MongoDB服務器有一個完整的安裝https://docs.mongodb.org/manual/installation/