Nodejsはバックグラウンド管理システムを構築します

npm install express mongoose body-parser morgan cors --save

mkdir blog-admin
cd blog-admin
npm init -y

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

const app = express();
const port = 3000;

// 连接 MongoDB 数据库，并创建 blog-admin 数据库
mongoose.connect('mongodb://localhost/blog-admin', { useNewUrlParser: true, useUnifiedTopology: true });
const db = mongoose.connection;
db.on('error', console.error.bind(console, '连接 MongoDB 数据库失败了：'));
db.once('open', function() {
  console.log('成功连接 MongoDB 数据库了！');
  // 创建文章、标签和分类数据表
  const articleSchema = new mongoose.Schema({
    title: String,
    content: String,
    createTime: Date,
    updateTime: Date,
    status: Number
  });
  const tagSchema = new mongoose.Schema({
    name: String
  });
  const categorySchema = new mongoose.Schema({
    name: String
  });
  mongoose.model('Article', articleSchema);
  mongoose.model('Tag', tagSchema);
  mongoose.model('Category', categorySchema);
});

app.use(cors());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(morgan('dev'));

// 获取文章列表
app.get('/api/article', (req, res) => {
  const Article = mongoose.model('Article');
  Article.find({}).exec((err, data) => {
    if (err) {
      res.send('获取文章列表失败了！');
    } else {
      res.json(data);
    }
  });
});

// 添加文章
app.post('/api/article', (req, res) => {
  const Article = mongoose.model('Article');
  const article = new Article(req.body);
  article.createTime = new Date();
  article.status = 0;
  article.save((err, data) => {
    if (err) {
      res.send('添加文章失败了！');
    } else {
      res.json(data);
    }
  });
});

// 修改文章
app.put('/api/article/:id', (req, res) => {
  const Article = mongoose.model('Article');
  Article.findByIdAndUpdate(req.params.id, req.body, (err, data) => {
    if (err) {
      res.send('修改文章失败了！');
    } else {
      res.json(data);
    }
  });
});

// 删除文章
app.delete('/api/article/:id', (req, res) => {
  const Article = mongoose.model('Article');
  Article.findByIdAndRemove(req.params.id, (err, data) => {
    if (err) {
      res.send('删除文章失败了！');
    } else {
      res.json(data);
    }
  });
});

// 启动服务器
app.listen(port, () => {
  console.log(`服务器已启动，访问地址：http://localhost:${port}/`);
});