Question

我是NodeJS的新手，我无法运行旧项目。这是错误信息......

错误：大多数中间件（如压缩）不再与Express捆绑在一起，必须单独安装。请参阅https://github.com/senchalabs/connect#middleware。

这是server.js的代码

/*** Module dependencies.*/
/*jshint loopfunc: true */
var express = require('express'),
    fs = require('fs'),
    passport = require('passport'),
    logger = require('mean-logger');

//Load configurations

var env = process.env.NODE_ENV = process.env.NODE_ENV || 'development',
    config = require('./config/config'),
    auth = require('./config/middlewares/authorization'),
    mongoose = require('mongoose');

//Bootstrap db connection
var db = mongoose.connect(config.db);
var register_models = require('./app/register_models');
register_models();


//Bootstrap models
var models_path = __dirname + '/app/models';
var walk = function(path) {
    fs.readdirSync(path).forEach(function(file) {
        var newPath = path + '/' + file;
        var stat = fs.statSync(newPath);
        if (stat.isFile()) {
            if (/(.*)\.(js|coffee)/.test(file)) {
                require(newPath);
            }
        } else if (stat.isDirectory()) {
            walk(newPath);
        }
    });
};
walk(models_path);

//bootstrap passport config
require('./config/passport')(passport);


var app = express();


//express settings
require('./config/express')(app, passport, db);

//Bootstrap routes
require('./config/routes')(app, passport, auth);

//Start the app by listening on <port>
var port = process.env.PORT || config.port;
app.listen(port);
console.log('Express app started on port ' + port);

//Initializing logger
logger.init(app, passport, mongoose);

//expose app
exports = module.exports = app;

Answer 1

这是因为快递4.xx，如果您的项目文件夹中的运行npm install命令和package.json具有依赖性，如“express”：“^ 4.10.6”或“express”：“*”，其中转将安装最新版的快递。它（表达4.x.x）不会让您的旧应用程序（用快速3.x.x或＆lt;版本编写）运行。

这个问题可以通过安装express＆lt; 4.x.x例如：

npm install express@3.x.x

或安装登录节点控制台的每个缺失模块（与上述缺失完全相同）

或者这里是关于从express 3.x.x迁移到4.x.x

的好文章

Migration Article

快乐帮助！

运行NodeJS时出错

1 个答案: