javascript - 类型错误 : cannot find module body-parser

Question

我尝试自己制作一个项目，但发生了这个错误。我无法修复它。它只是以某种方式发生，我很困惑从哪里开始寻找错误。

app.js

const path = require('path');

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

const app = express();

app.set('view engine', 'ejs');
app.set('views', 'views');

const adminData = require('./routes/admin');
const shopRoutes = require('./routes/shop');

app.use(bodyParser.urlencoded({ extended: false }));
app.use(express.static(path.join(__dirname, 'public')));

app.use('/admin', adminData.routes);
app.use(shopRoutes);

app.use((req, res, next) => {
  res.status(404).render('404', { pageTitle: 'Page Not Found' });
});
app.listen(3000);

admin.js

const path = require('path');

const express = require('express');

const rootDir = require('../util/path');

const router = express.Router();

const products = [];

// /admin/add-product => GET
router.get('/add-product', (req, res, next) => {
  res.render('add-product', {
    pageTitle: 'Add Product',
    path: '/admin/add-product',
    formsCSS: true,
    productCSS: true,
    activeAddProduct: true
  });
});

// /admin/add-product => POST
router.post('/add-product', (req, res, next) => {
  products.push({ title: req.body.title });
  res.redirect('/');
});

exports.routes = router;
exports.products = products;

shop.js

shop.js 的代码片段

这是我的错误。我第一次使用这个制作网页。

internal/modules/cjs/loader.js:638
    throw err;
    ^

Error: Cannot find module 'body-parser'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at Function.Module._load (internal/modules/cjs/loader.js:562:25)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.<anonymous> (C:\Users\User\Documents\My Website\05-working-on-layout-with-partials\app.js:4:20)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
[nodemon] app crashed - waiting for file changes before starting...

Answer 1

请尝试安装所需的body-parser模块，使用以下命令来执行此操作。

npm install body-parser