nodejs 应用程序在本地运行良好会在 glitch.com 中出现错误

Posted 2023-02-25

【中文标题】nodejs 应用程序在本地运行良好会在 glitch.com 中出现错误

【英文标题】：nodejs application is works fine in local gives error in glitch.com

【发布时间】：2020-04-19 18:47:21

【问题描述】：

我正在做 API 和微服务项目 - freecodecamp 中的锻炼跟踪器项目

我已经建立了一个在本地运行良好的迷你项目，所以我将它托管在 glitch.com 上

我面临一些错误项目link请帮我解决这个问题

server.js

const express = require("express");
const app = express();
const bodyParser = require("body-parser");

const cors = require("cors");
const  newUser, addExercise, showLogs  = require("./api/index.js");

const mongoose = require("mongoose");

mongoose.connect(process.env.MLAB_URI || "mongodb://localhost/exercise-track");

app.use(cors());

app.use(bodyParser.urlencoded( extended: false ));
app.use(bodyParser.json());

app.use(express.static("public"));
app.get("/", (req, res) => 
  res.sendFile(__dirname + "/views/index.html");
);

app.post("/exercise/new-user", (req, res) => newUser(req, res));
app.post("/exercise/add", (req, res) => addExercise(req, res));
app.get("/exercise/log", (req, res) => showLogs(req, res));

// Not found middleware
app.use((req, res, next) => 
  return next( status: 404, message: "not found" );
);

// Error Handling middleware
app.use((err, req, res, next) => 
  let errCode, errMessage;

  if (err.errors) 
    // mongoose validation error
    errCode = 400; // bad request
    const keys = Object.keys(err.errors);
    // report the first validation error
    errMessage = err.errors[keys[0]].message;
   else 
    // generic or custom error
    errCode = err.status || 500;
    errMessage = err.message || "Internal Server Error";
  
  res
    .status(errCode)
    .type("txt")
    .send(errMessage);
);

const listener = app.listen(process.env.PORT || 3000, () => 
  console.log("Your app is listening on port " + listener.address().port);
);

index.js 文件在这里

const User = require ('../model/user.js');
const Exercise = require ('../model/exercise.js');
const moment = require ('moment');

exports.newUser = function(req, res) 
  let name = req.body.username;
  if (!name) name = 'Mr/Mrs Doe';

  User.findOne( name: name )
    .then( (user) => 
      if (user) return new Promise( (resolve,reject) => reject('User already exists') );
      else return new User( name ).save();
    )
    .then( (newUser) => 
      if(!newUser.isNew) res.json( userId: newUser.userId, name: newUser.name );
    )
    .catch( (error) => res.status(422).json( error ) );
;


exports.addExercise = function(req, res) 
  // Dates are coming in in this format = 'YYYY-MM-DD';
  let  userId, description, duration, date  = req.body;
  console.log('description:', description, ' - duration: ', duration, ' - date: ', date);
  if (!description) description = 'No description provided';
  if (!duration) duration = '0';
  if (!date) date = moment();

  User.findOne( userId )
    .then( (user) => 
      if (user) 
        // console.log('---1. Date: ', date);
        const exercise = new Exercise( description, duration, date );
        exercise.userId.push(user);
        user.exercises.push(exercise);
        return Promise.all([exercise.save(), user.save()]);
      
      else return new Promise( (resolve,reject) => reject('UserId not found') );
    )
    .then( (exercise) => 
      if(!exercise.isNew) res.json( userId, description, duration, date: moment(date).format('D MMM, YYYY') );
      else return new Promise( (resolve,reject) => reject('Exercise could not be saved') );
    )
    .catch( (error) => res.status(422).json( error ) );
;


exports.showLogs = function(req, res) 
  const  userIdLogs, fromDate, toDate  = req.query;
  var populateExercises = (from, to) => 
    let params = 
      path: 'exercises',
      // match:  date : populateExercises(fromDate, toDate) ,
      select: 'description duration date',
      options:  sort:  date: -1 
    ;

    if(from && to) params.match =  date :  $gte: from, $lte: to  ;
    else if (from) params.match =  date :  $gte: from  ;
    else if (to) params.match =  date :  $lte: to  ;
    return params;
  ;

  // see if the userId exists
  User.findOne( userId: userIdLogs )
    .populate( populateExercises(fromDate, toDate) )
    .then( (user) => 
      if (!user) return new Promise( (resolve,reject) => reject('UserId not found') );
      else 
        const  userId, name  = user;
        res.json(
          search:  userId, name, fromDate, toDate ,
          total: user.total,
          exercises: user.exercises.map(function(exercise)
            // exercise.bla = moment(exercise.date).format('D MMM, YYYY');
            return 
              _id: exercise._id,
              description: exercise.description,
              duration: exercise.duration,
              date: moment(exercise.date).format('D MMM, YYYY')
            ;
          )
        );
      
    )
    .catch( (error) => res.status(422).json( error ));
;

错误日志在这里

module.js:478
    throw err;
    ^
Error: Cannot find module '../model/exercise.js'
    at Function.Module._resolveFilename (module.js:476:15)
    at Function.Module._load (module.js:424:25)
    at Module.require (module.js:504:17)
    at require (internal/module.js:20:19)
at Object.<anonymous> (/app/api/index.js:2:18)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
    at Function.Module._load (module.js:445:3)
    at Module.require (module.js:504:17)
    at require (internal/module.js:20:19)
at Object.<anonymous> (/app/server.js:6:44)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
module.js:478
    throw err;
    ^
Error: Cannot find module '../model/exercise.js'
    at Function.Module._resolveFilename (module.js:476:15)
    at Function.Module._load (module.js:424:25)
    at Module.require (module.js:504:17)
    at require (internal/module.js:20:19)
at Object.<anonymous> (/app/api/index.js:2:18)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)
    at tryModuleLoad (module.js:453:12)
    at Function.Module._load (module.js:445:3)
    at Module.require (module.js:504:17)
    at require (internal/module.js:20:19)
at Object.<anonymous> (/app/server.js:6:44)
    at Module._compile (module.js:577:32)
    at Object.Module._extensions..js (module.js:586:10)
    at Module.load (module.js:494:32)

但在我的本地它工作正常，我可以运行我的项目

【问题讨论】：

您必须提供更完整的应用程序。在我的脑海中，您似乎并没有将所有模块都部署到故障中。

感谢您让我知道我已经更新了问题

【参考方案1】：

您好，您的文件名似乎是execise.js，但您正尝试将exercise 导入/api/index.js。请将mode/execise.js的文件名修改为exercise.js