我在 MEAN 堆栈中的 To Do App 开发需要帮助

Question

我需要用 Node js、Express、MongoDB & Angular Js 做一个“做 APP”，用于企业测试。 我从未使用过 Stack MEAN，但目的是发现它。 企业已向我发送了带有路线的基础项目以及与 mongodb 数据库的连接。

因此，我只需为我的待办事项应用程序创建 function（添加新任务、更新任务、删除、按 id 搜索并显示所有任务）。

但是在理解路由文件以及如何将我的功能与前端的 Angular 应用程序连接之后，我遇到了一些麻烦。 是的，我对这个项目知之甚少。

这是路由文件：

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

module.exports = (mongoose) => {

  const Todo = mongoose.model('Todo')

  /**
   * Get all todos, it should support basic querying with Query Parameters
   *
   * e.g.: GET /todo/?task=myTask&done=true
   */
  async function getAllTodos (req, res, next) {
    const result = await Todo.find()
    return res.status(200).json(result)
  }

  /**
   * Get single todo
   */
  async function getTodoById (req, res, next) {
    return res.status(200).json({'hello': 'world'})
  }

  /**
   * Update single todo
   */
  async function updateTodoById (req, res, next) {
    return res.status(200).json({'hello': 'world'})
  }

  /**
   * Create new todo
   */
  async function createNewTodo (req, res, next) {
    return res.status(200).json({'hello': 'world'})
  }

  /**
   * Delete single todo
   */
  async function deleteTodoById (req, res, next) {
    return res.status(200).json({'hello': 'world'})
  }

  router.get('/?', getAllTodos)
  router.get('/:id', getTodoById)
  router.put('/:id', updateTodoById)
  router.post('/?', createNewTodo)
  router.delete('/:id', deleteTodoById)
  return router
} 

这里是 app.js 文件：

const express = require('express')
const cors = require('cors')
const bodyParser = require('body-parser')
const todoRoutes = require('./routes/todo/todo.route')
const getMongoose = require('./database')

module.exports = async () => {
  const app = express()
  // Get mongoose instance
  const mongoose = await getMongoose()

  // Add minimal middlewares for basic queries
  app.use(cors())
  app.use(bodyParser.json())

  // Add todo routes
  app.use('/todo', todoRoutes(mongoose))


  // Add fallback for uncaught routes
  app.use((req, res, next) => {
    return res.status(501).json('Not Implemented')
  })
  return app
}

Answer 1

Refer to this link step by step:
https://www.codementor.io/shanewignall/making-a-restful-backend-with-node-js-knf7nbsii

step:1
create one folder
Ex:backend-demo

step:2
open cmd
run command: npm init
Then you can see as below
package name: (backend-demo) then press enter,enter..
last you can view:
{
  "name": "backend-demo",
  "version": "1.0.0",
  "description": "backend-demo",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}
step:3
run cmd:npm i
step:4
create server.js file

server.js file:
const http = require('http');
const app = require('./config/app'); // The express app we just created

const port = 3000;
app.set('port', port);

const server = http.createServer(app);
server.listen(port, () => {
  console.log(`Express server listening on port ${port}`);
});
step:5
create app.js file inside config folder
app.js file:
const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
const app = express();
app.use(bodyParser.urlencoded({ limit: '2gb', extended: true }));
app.use(bodyParser.json({ limit: '2gb', extended: true }));
app.use(cors());
// Parse incoming requests data (https://github.com/expressjs/body-parser)
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
// Require our routes into the application.
app.use(require('../routes'));
app.all('/*', (req, res) => {
  return res.status(404).json({
    errors: { message: req.t('INVALID_REQUEST') },
    status: 1
  });
});
module.exports = app;
step:6
You have to create route and model files.