这是控制器类

const Product = require('../models/product.model');

//Simple version, without validation or sanitation
exports.test = function (req, res) {
    res.send('Greetings from the Test controller!');
};

exports.product_create = function (req, res) {
    const product = new Product(
        {
            name: req.body.name,
            price: req.body.price
        }
    );

    product.save(function (err) {
        if (err) {
            return next(err);
        }
        res.send('Product Created successfully')
    })
};

models/product.model.js

var mongoose = require('mongoose');
const Schema = mongoose.Schema;

const ProductSchema = new Schema({
    name: {type: String, required: true, max: 100},
    price: {type: Number, required: true},
});

exports.product_details = function (req, res) {
    Product.findById(req.params.id, function (err, product) {
        if (err) return next(err);
        res.send(product);
    })
};
exports.product_delete = function (req, res) {
    Product.findByIdAndRemove(req.params.id, function (err) {
        if (err) return next(err);
        res.send('Deleted successfully!');
    })
};

exports.product_update = function (req, res) {
    Product.findByIdAndUpdate(req.params.id, {$set: req.body}, function (err, product) {
        if (err) return next(err);
        res.send('Product udpated.');
    });
};
router.put('/:id/update', product_controller.product_update);

// Export the model
module.exports = mongoose.model('Product', ProductSchema);

js这用于路由

const express = require('express');
const router = express.Router();

// Require the controllers WHICH WE DID NOT CREATE YET!!
const product_controller = require('../controllers/product.controller');
router.post('/create', product_controller.product_create);

// a simple test url to check that all of our files are communicating correctly.
router.get('/test', product_controller.test);
router.put('/:id/update', product_controller.product_update);
router.delete('/:id/delete', product_controller.product_delete);

module.exports = router;

这是应用程序js

const express = require('express');
const bodyParser = require('body-parser');

const product = require('./routes/product.route'); // Imports routes for the products
const app = express();

// Set up mongoose connection on mongoAtlas
//https://codeburst.io/writing-a-crud-app-with-node-js-and-mongodb-e0827cbbdafb
const mongoose = require('mongoose');
const dev_db_url = 'mongodb://someuser:abcd1234@ds123619.mlab.com:23619/productstutorial';
const mongoDB = process.env.MONGODB_URI || dev_db_url;
mongoose.connect(mongoDB);
mongoose.Promise = global.Promise;
const db = mongoose.connection;
db.on('error', console.error.bind(console, 'MongoDB connection error:'));

app.use('/products', product);

app.listen(3000,function () {
    console.log("Server listen on port: 3000");

});

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));
app.use('/products', product);

所以这是该项目的代码，请添加脚本“开始”：“node app.js”。这将可以直接使用这个和更新，插入和删除数据也在这里给出了代码。