javascript - SyntaxError：意外的令牌“导出”试图将用户故事合并到我的项目

Question

您好，我知道它应该是 module.exports 而不是 exports 但这甚至不起作用并让我出错：Route.get() 需要一个回调函数但得到一个 [object Undefined] 任何想法我应该怎么做对不起我我是初学者，我已经发布了我尝试添加的用户故事的 3 个 js 文件和 server.js 文件

第一个 .js 文件。

    const scheduleData = require('../models/schedule.js'); 


exports.getschedule= async (req,res) => {
    try {
        const allschedule= await scheduleData.find(); 

        res.status(200).json(allschedules); //Ok
    } catch (error) {
        res.status(404).json({message: error.message}) //Not Founnd
    }
}

exports.createschedules= async (req,res) => {
    const schedule= req.body; 

    const newschedule = new scheduleData(schedule); 

    try {
        await newschedule.save(); 
        res.status(201).json(newschedule); //Created
    
    } catch (error) {
        res.status(409).json({message: error.message}) //Conflict 
    }

} 

exports.deleteschedule= async (req,res) => {
    const id= req.params.id; 


    try {
       await scheduleData.findByIdAndRemove(id).exec(); 
       res.send('Successfully deleted!')
    
    } catch (error) {
        console.log(error); 
        
    }

}

第二个文件

const express = require ('express')
const  { getschedule} = require ( '../../controllers/schedule.js')
const  { createschedule} = require ( '../../controllers/schedule.js')
const  { deleteschedule} = require ( '../../controllers/schedule.js')

const router = express.Router();



router.get('/', getschedule);
router.post('/', createschedule);
router.delete('/:id', deleteschedule);



//export default router;
module.exports = router;

第三场

 const mongoose = require  ('mongoose'); 

const scheduleSchema = mongoose.Schema({
    Day: String,
    FirstP: String, 
    SecondP: String,
    ThirdP: String, 
    FourthP: String, 
    FifthP: String,  
    tutorial: {
        type: String, 
        default: 'A'
    },
    
}); 

//const schedule= mongoose.model('schedule', scheduleSchema);
//export default schedule;
module.exports = schedule=mongoose.model('schedule', scheduleSchema);

server.js 文件

    const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const path = require('path');
const auth = require('./routes/api/auth.routes.js');
const scheduleroutes = require ('./routes/api/schedule'); 
const courses = require('./routes/api/courses');


const app = express();

// Bodyparser Middleware
app.use(bodyParser.json());

// DB Config
const db = require('./config/keys').mongoURI;


// Connect to Mongo
mongoose
    .connect(db, { useNewUrlParser: true }) // Adding new mongo url parser
    .then(() => console.log('MongoDB Connected...'))
    .catch(err => console.log(err));

mongoose.set('debug', true);

// Use Routes
app.use('/api/courses', courses);
app.use(express.json());
app.use('/api/auth', auth);

app.use('/api/schedule',scheduleroutes);
//app.use(cors({ origin: 'http://localhost:3000/', credentials: true }));

if (process.env.NODE_ENV === 'production') {
    // Set static folder
    app.use(express.static('client/build'));

    app.get('*', (req, res) => {
        res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'));
    });
}

const port = process.env.PORT || 5000;

app.listen(port, () => console.log(`Server started on port ${port}`));

标签： javascriptexpressmern

Answer 1

似乎您正在将 require/exports (CommonJs) 与 import/export (ES6) 语法混合在一起。通常，NodeJs在解析模块时使用require/exports 。尝试使用一种一致的风格。你能改成这个，看看错误是否仍然存在：

第一个.js

const scheduleData = require('../models/schedule.js');

// Named exports
exports.getschedule = async (req,res) => {
    try {
        const allschedule= await scheduleData.find(); 

        res.status(200).json(allschedules); //Ok
    } catch (error) {
        res.status(404).json({message: error.message}) //Not Founnd
    }
}

exports.createschedules = async (req, res) => {
    ...
}

第二个.js

const {getSchedule} = require("./first.js");
const express = require("express");

const router = express.Router();
router.get("/", getSchedule);

module.exports = router;

第三个.js

const mongoose = require('mongoose'); 

const scheduleSchema = mongoose.Schema({
    Day: String,
    FirstP: String, 
    SecondP: String,
    ThirdP: String, 
    FourthP: String, 
    FifthP: String,  
    tutorial: {
        type: String, 
        default: 'A'
    },
    
}); 

// Default export
module.exports = mongoose.model('schedule', scheduleSchema);