通过nodemon启动应用程序出错

Question

我正在构建一个全栈应用程序，经过大量的浪费努力，我来到这里询问你们关于以下错误的问题。

另外，我确实知道这个错误的含义，因为我已经阅读过它，但我仍然无法找出某个地方存在的缺陷。

请求您帮助我，以便我可以继续我的工作。

文件夹架构：

nearbywi-fi（主目录）： bin、node_modules、public、server、app.js、bower.js on, package.json, procfile, yarn-error.log, package-lock.json

公共：引导、图像、javascript、样式表

服务器：控制器、路由、视图

错误：

pinkman@pinkman:~/nearbywi-fi$ nodemon
[nodemon] 1.12.5
[nodemon] to restart at any time, enter `rs`
[nodemon] watching: *.*
[nodemon] starting `node index.js`
module.js:544
throw err;
^

Error: Cannot find module '/home/pinkman/nearbywi-fi/index.js'
at Function.Module._resolveFilename (module.js:542:15)
at Function.Module._load (module.js:472:25)
at Function.Module.runMain (module.js:682:10)
at startup (bootstrap_node.js:191:16)
at bootstrap_node.js:613:3
[nodemon] app crashed - waiting for file changes before starting...

index.js

var express = require('express');
var router = express.Router();
var ctrlLocations = require('./controllers/locations');
var ctrlOthers = require('./controllers/others');

router.get('/', ctrlLocations.homelist);
router.get('/location', ctrlLocations.locationInfo);
router.get('/location/review/new', ctrlLocations.addReview);

router.get('/about', ctrlOthers.about);

module.exports = router;

app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./server/routes/index');
var users = require('./server/routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'server', 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

// catch 404 and forward to error handler

app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: err
    });
});
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
    message: err.message,
    error: {}
});
});


module.exports = app;

package.json

{
 "name": "Nearbywi-fi",
 "version": "v1.3.2",
 "private": true,
 "scripts": {
 "start": "node ./bin/www",
 "postinstall": "node -e \"try { require('fs').symlinkSync(require('path').resolve('node_modules/@bower_components'), 'bower_components', 'junction') } catch (e) { }\""},
  "dependencies": {
  "body-parser": "~1.18.2",
  "cookie-parser": "~1.4.3",
  "debug": "~2.6.9",
  "express": "~4.15.5",
  "jade": "^1.11.0",
  "jquery": "^3.2.1",
  "jstransformer": "^1.0.0",
  "morgan": "~1.9.0",
  "nodemon": "^1.12.5",
  "pug": "^2.0.0-rc.4",
  "serve-favicon": "~2.4.5"
  },
  "main": "index.js",
  "author": "vivek Gupta",
  "license": "MIT",
  "devDependencies": {
  "bootstrap": "^4.0.0-alpha.6"
  },
  "engines": {
  "yarn": ">= 1.0.0"
  }
 }

Answer 1

单独使用nodemon 会尝试运行 index.js

在你的情况下，这个文件是一个路由，而不是主应用程序，它甚至不在根目录中。所以你想运行nodemon app.js

这在日志和您的错误中得到了很好的总结：

[nodemon] starting `node index.js`
Error: Cannot find module '/home/pinkman/nearbywi-fi/index.js'

编辑：

根据您提供的 package.json，似乎入口点实际上应该是 "./bin/www"，所以您需要 "nodemon ./bin/www"。

另外，在你的 package.json 中，它写着 "main": "index.js", 但这应该是 "main": "bin/www",