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

Question

我现在正在接受 nodejs 培训，以及如何使用 nodejs 和 expressjs 作为框架开发 MVC 应用程序。我有一个 TDD 方法以及模型和视图类与 TDD 测试脚本一起编写。我有一个 mongodb 测试脚本，它失败并显示以下错误消息：

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

我将 Jasmine 用于节点作为测试包，所有其他测试仅通过模型和视图类编写。我不明白为什么我的 mongodb TDD 脚本在 mongodb 上失败，而当我 npm start 时，它没有开始返回 app.js 错误消息：

> node app.js

Sorry, the server (mongodb) is not running

我回头研究了堆栈跟踪，据我所知，mongodb 没有建立连接，它返回 null。我检查了 mongodb 以确保它在那里：

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

我已经尝试了很多补救措施，但迄今为止没有任何效果。关于解决与服务器的连接问题的任何想法，以便我可以继续进行此 expressjs MVC 培训项目？

我的 config/index.js 看起来像这样：

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;

这是我将 package.json 文件和 npm install mongodb --save 扩充到运行在 npm install[=20= 之后安装 mongo 时得到的输出]

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

谢谢...

Answer 1

这看起来不像是安装组件 return exit 0 的错误，这很好。

需要说明的是，您安装的软件包只是官方 mongodb 驱动程序 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 服务器才能进行完整安装 https://docs.mongodb.org/manual/installation/

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

Connection Error (err) - Mongodb connection using nodejs in an expressjs framework

tdd

mongodb

node.js

express