Question

我尝试将我的应用部署到heroku服务中，但在推送文件后，日志会给我这个错误：错误：大多数中间件（如记录器）不再与Express捆绑在一起，必须单独安装。

我的package.json是

{
   "dependencies":{
      "connect":"3.0.0-rc.2",
      "express":"^4.1.1",
      "express-logger":"0.0.2",
      "gzippo":"^0.2.0",
      "logfmt":"^1.1.2"
   },
   "devDependencies":{
      "connect":"3.0.0-rc.2",
      "grunt":"~0.4.1",
      "grunt-autoprefixer":"~0.4.0",
      "grunt-bower-install":"~1.0.0",
      "grunt-concurrent":"~0.5.0",
      "grunt-contrib-clean":"~0.5.0",
      "grunt-contrib-compass":"~0.7.2",
      "grunt-contrib-concat":"~0.3.0",
      "grunt-contrib-connect":"~0.5.0",
      "grunt-contrib-copy":"~0.4.1",
      "grunt-contrib-cssmin":"~0.7.0",
      "grunt-contrib-htmlmin":"~0.1.3",
      "grunt-contrib-imagemin":"~0.3.0",
      "grunt-contrib-jshint":"~0.7.1",
      "grunt-contrib-uglify":"~0.2.0",
      "grunt-contrib-watch":"~0.5.2",
      "grunt-google-cdn":"~0.2.0",
      "grunt-karma":"^0.8.3",
      "grunt-newer":"~0.6.1",
      "grunt-ngmin":"~0.0.2",
      "grunt-rev":"~0.1.0",
      "grunt-svgmin":"~0.2.0",
      "grunt-usemin":"~2.0.0",
      "jshint-stylish":"~0.1.3",
      "karma":"^0.12.14",
      "karma-jasmine":"^0.1.5",
      "karma-ng-html2js-preprocessor":"^0.1.0",
      "karma-ng-scenario":"^0.1.0",
      "load-grunt-tasks":"~0.4.0",
      "time-grunt":"~0.2.1"
   },
   "engines":{
      "node":">=0.10.0"
   },
   "name":"eversnap",
   "scripts":{
      "test":"grunt test"
   },
   "version":"0.0.1"
}

Answer 1

看起来Express 4从Express 3升级但是json（也许代码也不是）。

// package.json (Express 4)
...
  "dependencies": {
    "express": "~4.0.0",
    "morgan": "~1.0.0",
    "body-parser": "~1.0.0",
    "method-override": "~1.0.0"
  }
...

示例代码（有关详细信息，请参阅文档）：

// server.js (Express 4)
var express        = require('express');
var morgan         = require('morgan');
var bodyParser     = require('body-parser');
var methodOverride = require('method-override');
var app            = express();

// Replace your Express 3 code, from
//
// app.use(express.logger('dev'));                 
// app.use(express.bodyParser());
// app.use(express.methodOverride()); 
//
// to:
app.use(morgan('dev')); // log every request to the console
app.use(bodyParser()); // pull information from html in POST
app.use(methodOverride());  // simulate DELETE and PUT
app.listen(8080);

另一种选择是更改package.json中的express版本，改为使用Express 3，即。

“express”：“~3.0.0”

Answer 2

我建议你安装logger软件包，正如它所说的那样，然后在你的应用程序中使用它。我遇到了同样的问题，但是在我安装了所需的软件包并使用它之后，例如app.use(logger())而不是app.use(express-logger())

Heroku，node.js，服务器崩溃错误：大多数中间件（如logger）不再与Express捆绑在一起，必须单独安装

2 个答案: