问题描述
您好,我知道它应该是 module.exports 而不是导出,但这甚至不起作用并让我出错:Route.get() 需要一个回调函数,但得到了 [object Undefined] 任何想法我该怎么做抱歉,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
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}`));
解决方法
您似乎将 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。你能不能改成这个,看看错误是否仍然存在:
first.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) => {
...
}
second.js
const {getSchedule} = require("./first.js");
const express = require("express");
const router = express.Router();
router.get("/",getSchedule);
module.exports = router;
third.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);