连接错误（错误） - 在expressjs框架中使用nodejs的Mongodb连接

Question

现在在nodejs中进行培训，以及如何使用nodejs和expressjs作为框架开发MVC应用程序。我有TDD方法以及与TDD测试脚本一起编写的Model和View类。我有一个MongoDB的测试脚本，也未能与以下错误信息：用茉莉花节点作为测试包

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和其他所有测试都通过了与刚刚写入的模型和视图类。我不明白为什么我的MongoDB的TDD脚本失败有关MongoDB，当我npm start，它不会开始返回的app.js错误消息：

> node app.js 

Sorry, the server (mongodb) is not running 

我研究后面的堆栈跟踪，并从我所看到的，与mongodb没有联系，并且返回null。我检查MongoDB中，以确保它的存在：

Johns-MacBook-Pro:expressjs_multech_project mul$ npm list mongodb 
[email protected] /Users/.../expressjs_multech_project 
└── [email protected] 

我已经试过配发的补救措施，但没有最新的工作。关于解决与服务器连接问题的任何想法，所以我可以继续这个expressjs MVC培训项目？

我的配置/ index.js看起来是这样的：

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; 

这是我当我充实了package.json文件。OUPUTS和npm install mongodb --save后npm install

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

> [email protected] 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 

> [email protected] 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 
[email protected] /Users/jmulhall/Documents/Web_Development/Express-Nodejs/expressjs_multech_project 
├─┬ [email protected] 
│ └─┬ [email protected] 
│ └─┬ [email protected] 
│  └─┬ [email protected] 
│  └─┬ [email protected] 
│   └── [email protected] 
└─┬ [email protected] 
    ├─┬ [email protected] 
    │ └── [email protected] 
    ├── [email protected] 
    └─┬ [email protected] 
    └── [email protected] 

由于运行安装蒙戈...

Answer 1

这看起来不像安装时的错误，因为组件返回exit 0这很好。

需要明确的是，虽然您正在安装的软件包是唯一的官方MongoDB的驱动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.

您需要安装MongoDB服务器有一个完整的安装https://docs.mongodb.org/manual/installation/