✅快速构建 Express 服务

mkdir backendcd backend

pnpm init

pnpm install express mongoosepnpm install --save-dev typescript ts-node nodemon @types/express @types/mongoose

{  "compilerOptions": {    "target": "es6",    "module": "commonjs",    "outDir": "dist",    "strict": true,    "esModuleInterop": true  },  "include": ["src"]}

import mongoose from 'mongoose';
const userSchema = new mongoose.Schema({  name: {    type: String,    required: true  },  age: {    type: Number,    required: true  }});
export default mongoose.model('User', userSchema);

import express, { Request, Response, NextFunction }  from 'express';import User from './models';
const router = express.Router();
// 获取用户列表router.get('/users', async (req, res) => {  try {    const users = await User.find();    res.json(users);  } catch (error:any) {    res.status(500).json({ message: error.message });  }});
// 创建用户router.post('/users', async (req, res) => {  const { name, age } = req.body;  const user = new User({ name, age });
  try {    const newUser = await user.save();    res.status(201).json(newUser);  } catch (error:any) {    res.status(400).json({ message: error.message });  }});
// 获取单个用户router.get('/users/:id', getUser, (req, res:any) => {  res.json(res.user);});
// 更新用户router.patch('/users/:id', getUser, async (req, res:any) => {  const { name, age } = req.body;
  if (name) {    res.user.name = name;  }
  if (age) {    res.user.age = age;  }
  try {    const updatedUser = await res.user.save();    res.json(updatedUser);  } catch (error:any) {    res.status(400).json({ message: error.message });  }});
// 删除用户router.delete('/users/:id', getUser, async (req, res:any) => {  try {    await res.user.remove();    res.json({ message: 'User deleted' });  } catch (error:any) {    res.status(500).json({ message: error.message });  }});
async function getUser(req: Request, res: any, next: NextFunction) {  let user;
  try {    user = await User.findById(req.params.id);
    if (user == null) {      return res.status(404).json({ message: 'User not found' });    }  } catch (error:any) {    return res.status(500).json({ message: error.message });  }
  res.user = user;  next();}
export default router;

import express from 'express';import mongoose from 'mongoose';import routes from './routes';
const app = express();const port = 3000;
app.use(express.json());app.use(routes);
mongoose.connect('mongodb://localhost:27017/mydatabase', {  useNewUrlParser: true,  useUnifiedTopology: true}).then(() => {  console.log('Connected to MongoDB');}).catch((error) => {  console.error('Error connecting to MongoDB:', error.message);});
app.listen(port, () => {  console.log(`Server running on port ${port}`);});

{  "scripts": {    "start": "nodemon --exec ts-node src/app.ts"  }}

pnpm start

mkdir backendcd backend
pnpm init
pnpm install expresspnpm install --save-dev typescript ts-node nodemon @types/express

npm install sqlite3 sequelizepnpm install @types/body-parser

import { Sequelize, DataTypes, Model } from 'sequelize';
export interface TodoListAttributes {  id?: number;  title: string;  desc: string;}
export class TodoList extends Model<TodoListAttributes> implements TodoListAttributes {  public id!: number;  public title!: string;  public desc!: string;
  public readonly createdAt!: Date;  public readonly updatedAt!: Date;}
export const sequelize = new Sequelize({  dialect: 'sqlite',  storage: ':memory:'});
TodoList.init(  {    title: {      type: DataTypes.STRING,      allowNull: false    },    desc: {      type: DataTypes.STRING,      allowNull: false    }  },  {    sequelize,    modelName: 'TodoList'  });

import { Request, Response } from 'express';import { TodoList } from '../model/models';
export const createTodoList = async (req: Request, res: Response) => {  try {    const { title, desc } = req.body;    const todoList = await TodoList.create({ title, desc });    res.status(201).json(todoList.toJSON());  } catch (error) {    console.error('Error creating todoList:', error);    res.status(500).json({ error: 'Internal server error' });  }};
export const getTodoList = async (req: Request, res: Response) => {  try {    const todoLists = await TodoList.findAll();    res.json(todoLists.map(todoList => todoList.toJSON()));  } catch (error) {    console.error('Error getting todoLists:', error);    res.status(500).json({ error: 'Internal server error' });  }};
export const getTodoListById = async (req: Request, res: Response) => {  try {    const { id } = req.params;    const todoList = await TodoList.findByPk(id);    if (todoList) {      res.json(todoList.toJSON());    } else {      res.status(404).json({ error: 'TodoList not found' });    }  } catch (error) {    console.error('Error getting todoList by ID:', error);    res.status(500).json({ error: 'Internal server error' });  }};
export const updateTodoList = async (req: Request, res: Response) => {  try {    const { id } = req.params;    const { title, desc } = req.body;    const todoList = await TodoList.findByPk(id);    if (todoList) {      await todoList.update({ title, desc });      res.json(todoList.toJSON());    } else {      res.status(404).json({ error: 'TodoList not found' });    }  } catch (error) {    console.error('Error updating todoList:', error);    res.status(500).json({ error: 'Internal server error' });  }};
export const deleteTodoList = async (req: Request, res: Response) => {  try {    const { id } = req.params;    const todoList = await TodoList.findByPk(id);    if (todoList) {      await todoList.destroy();      res.json({ message: 'TodoList deleted successfully' });    } else {      res.status(404).json({ error: 'TodoList not found' });    }  } catch (error) {    console.error('Error deleting todoList:', error);    res.status(500).json({ error: 'Internal server error' });  }};

import express from 'express';import { createTodoList, getTodoList, getTodoListById, updateTodoList, deleteTodoList } from '../utils/controllers';
const router = express.Router();
router.post('/todo-list', createTodoList);router.get('/todo-list', getTodoList);router.get('/todo-list/:id', getTodoListById);router.put('/todo-list/:id', updateTodoList);router.delete('/todo-list/:id', deleteTodoList);
export default router;

import express from 'express';import bodyParser from 'body-parser';import { sequelize } from './model/models';import router from './router/router';
const app = express();
app.use(bodyParser.json());app.use(router);
const startServer = async () => {  try {    await sequelize.sync();    app.listen(3000, () => {      console.log('Server is running on port 3000');    });  } catch (error) {    console.error('Error starting server:', error);  }};
startServer();

pnpm start