Я провел много исследований и пробовал разные вещи, но я могу решить некоторые запросы POST.
GET-запросы и POST-запросы, которые добавляют упражнение, но POST-запросы, которые удаляют или обновляют упражнение.
Я предполагаю, что некоторые ответы не распознаются экспрессом в упражнениях .jsфайл, так как он терпит неудачу всякий раз, когда вызывается Exercise.findById (res.params.id) в рамках маршрута обновления или удаления.
Любая помощь будет высоко ценится.
server.js
const express = require('express') // Express web framework
const cors = require('cors') // Cross-origin resource sharing (CORS) -> Connects Express
const mongoose = require('mongoose') // Mongoose will connect us to the mongoDB database
const exercisesRouter = require('./routes/exercises')
const usersRouter = require('./routes/users')
require('dotenv').config() // configure environment variables in .env file
// to create the Express server
const app = express()
const port = process.env.PORT || 5000 // 5000 Port
// Middleware
app.use(cors()) // CORS middleware
app.use(express.json()) // Express middleware to allow us to parse JSON
// MongoDB Connection process
const uri = process.env.ATLAS_URI // MongoDB database URI connection string form mongoDB Atlas -- ATLAS_URI will be stored in .env file
mongoose.connect(uri, { useNewUrlParser: true, useCreateIndex: true, useUnifiedTopology: true }) // start connection to db
const connection = mongoose.connection
connection.once('open', () => {
console.log("MongoDB database connection established successfully")
})
// Routing to respective pages
app.use('/exercises', exercisesRouter) // routes to /exercises page
app.use('/users', usersRouter)// routes to /users page
// Start the server
app.listen(port, () => {
console.log(`Server is running on port: ${port}`)
})
упражнения.model.js
const mongoose = require('mongoose')
const Schema = mongoose.Schema
const exerciseSchema = new Schema({
username: { type: String, required: true },
description: { type: String, required: true},
duration: { type: Number, required: true},
date: { type: Date, required: true}
}, {
timestamps: true,
})
const Exercise = mongoose.model('Exercise', exerciseSchema)
module.exports = Exercise
exerc.js
const router = require('express').Router() // Creating route for Exercises
let Exercise = require('../models/exercises.model') // Mongoose model
// Handles incoming HTTP GET requests for /exercises URL
router.route('/').get((req, res) => {
Exercise.find()
.then(exercises => res.json(exercises))
.catch(err => res.status(400).json('Error: ' + err))
})
/*** Handles incoming HTTP POST requests ***/
// Create new exercise
router.route('/add').post((req, res) => {
const username = req.body.username
const description = req.body.description
const duration = Number(req.body.duration)
const date = Date.parse(req.body.date)
const newExercise = new Exercise({
username,
description,
duration,
date
})
newExercise.save()
.then(() => res.json('Exercise added !'))
.catch(err => res.status(400).json('Error = ' + err))
})
// Get exercise by ID
router.route('/:id').get((req, res) => {
Exercise.findById(req.params.id)
.then(exercises => res.json(exercises))
.catch(err => res.status(400).json('Error: ' + err))
})
// Delete exercise
router.route('/:id').delete((res, req) => {
Exercise.findByIdAndDelete(req.params.id)
.then(() => res.json('Exercise deleted'))
.catch(err => res.status(400).json('Error: ' + err))
})
// Update exercise
router.route('/update/:id').post((res, req) => {
Exercise.findById(req.params.id)
.then(exercises => {
exercises.username = req.body.username
exercises.description = req.body.description
exercises.duration = Number(req.body.duration)
exercises.date = Date.parse(req.body.date)
exercises.save()
.then(() => res.json('Exercise updated!'))
.catch(err => res.status(400).json('Error: ' + err))
})
.catch(err => res.status(400).json('Error: ' + err))
})
module.exports = router
выход сервера nodemon
[nodemon] starting `node server.js`
Server is running on port: 5000
MongoDB database connection established successfully
TypeError: Cannot read property 'id' of undefined
at C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\routes\exercises.js:48:34
at Layer.handle [as handle_request] (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\route.js:137:13)
at Route.dispatch (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:281:22
at param (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:354:14)
at param (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:365:14)
at Function.process_params (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:410:3)
at next (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:275:10)
at Function.handle (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:174:3)
at router (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:47:12)
at Layer.handle [as handle_request] (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\layer.js:95:5)
at trim_prefix (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:317:13)
at C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:284:7
at Function.process_params (C:\Users\sambaetleuk\Projects\mern-fitness-tracker\backend\node_modules\express\lib\router\index.js:335:12)